This patch makes the build system pass -Wl,-rpath=$out/lib even for
libraries (it already does so for executables, thanks to 'DO_GNU_APP'
in 'Makefile.shared'.)

--- openssl-1.0.2a/Makefile.shared	2015-04-05 01:07:35.357602454 +0200
+++ openssl-1.0.2a/Makefile.shared	2015-04-05 01:09:50.474513303 +0200
@@ -106,7 +106,7 @@ LINK_SO=	\
     LIBPATH=`for x in $$LIBDEPS; do echo $$x; done | sed -e 's/^ *-L//;t' -e d | uniq`; \
     LIBPATH=`echo $$LIBPATH | sed -e 's/ /:/g'`; \
     LD_LIBRARY_PATH=$$LIBPATH:$$LD_LIBRARY_PATH \
-    $${SHAREDCMD} $${SHAREDFLAGS} \
+    $${SHAREDCMD} $${SHAREDFLAGS} -Wl,-rpath,$(LIBRPATH) \
 	-o $$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX \
 	$$ALLSYMSFLAGS $$SHOBJECTS $$NOALLSYMSFLAGS $$LIBDEPS \
   ) && $(SYMLINK_SO)
zko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>refs</a><a class='active' href='/guix/log/gnu/packages.scm'>log</a><a href='/guix/tree/gnu/packages.scm?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>tree</a><a href='/guix/commit/gnu/packages.scm?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>commit</a><a href='/guix/diff/gnu/packages.scm?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages.scm'>
<input type='hidden' name='id' value='4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>root</a>/<a href='/guix/log/gnu?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>gnu</a>/<a href='/guix/log/gnu/packages.scm?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e'>packages.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages.scm?id=4bfd8579f9e06a0a0eafb69be7233bb99c75a02e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-05-13 13:29:27 +0200'>2018-05-13</span></td><td><a href='/guix/commit/gnu/packages.scm?id=348987d3d12ebaf11fdbcc3dbd56585e7d69a1f5'>packages: 'find-packages-by-name' properly honors version prefixes.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-04-08 17:48:33 +0200'>2018-04-08</span></td><td><a href='/guix/commit/gnu/packages.scm?id=3c0128b035ae00462f1b0a4427d9525d750e5575'>discovery: Remove dependency on (guix ui).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-04-08 17:41:08 +0200'>2018-04-08</span></td><td><a href='/guix/commit/gnu/packages.scm?id=eaae07ec2878707744fed76029a28ab9a494fc2e'>Add (guix self).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-07 00:12:10 +0100'>2017-11-07</span></td><td><a href='/guix/commit/gnu/packages.scm?id=96dc8f3527a6ac0c84b51f7a0cac1d8052cf0e72'>packages: 'fold-packages' takes #:select? parameter.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-09-01 10:29:39 +0200'>2017-09-01</span></td><td><a href='/guix/commit/gnu/packages.scm?id=5c5ae46c00fd553c6fd23aeba1961e201f6555c7'>packages: 'fold-packages' takes an optional 'modules' parameter.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-06-11 23:05:23 +0200'>2017-06-11</span></td><td><a href='/guix/commit/gnu/packages.scm?id=c08ea55e7ec25261e4596bf6726a83c1ed056b94'>packages: Add 'specifications-&gt;manifest'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-03 23:50:15 +0200'>2017-05-03</span></td><td><a href='/guix/commit/gnu/packages.scm?id=cd903ef7871170d3c4eced45418459d293ef48a7'>Add (guix discovery).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-03 16:16:17 +0200'>2017-05-03</span></td><td><a href='/guix/commit/gnu/packages.scm?id=69daee23af49aeafcb1d250c90860f9253da719e'>ui: Rename '_' to 'G_'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-05-01 17:27:54 +0200'>2017-05-01</span></td><td><a href='/guix/commit/gnu/packages.scm?id=e30c2be10da8929e42aafc7770257e84de49ffbb'>packages: Remove support for PACKAGE-VERSION deprecated syntax.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-03-08 23:42:53 +0100'>2017-03-08</span></td><td><a href='/guix/commit/gnu/packages.scm?id=d75e8f36a80be8155f40678e30d8384c205cf96f'>packages: Use PACKAGE@VERSION syntax when reporting ambiguities.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-02-27 16:44:57 +0300'>2017-02-27</span></td><td><a href='/guix/commit/gnu/packages.scm?id=96eaa55ffb9877c319df09d158fca31034d8f0a2'>packages: Add 'search-auxiliary-file'.</a><span class='msg-avail'>...</span></td><td>Alex Kost</td></tr>
<tr><td><span title='2017-01-28 18:55:20 +0100'>2017-01-28</span></td><td><a href='/guix/commit/gnu/packages.scm?id=55b2d921456e888f097bf4e43a3d25b112f3e563'>Use 'mlambda' instead of 'memoize'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-01-28 18:55:20 +0100'>2017-01-28</span></td><td><a href='/guix/commit/gnu/packages.scm?id=f9704f179a5160013c4a401dce3761714bba8e72'>Add (guix memoization).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>