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)
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<div class='path'>path: <a href='/guix/log/?id=7bdd76c888e47551aac23031a4a97d7000d1ea35'>root</a>/<a href='/guix/log/gnu?id=7bdd76c888e47551aac23031a4a97d7000d1ea35'>gnu</a>/<a href='/guix/log/gnu/tests?id=7bdd76c888e47551aac23031a4a97d7000d1ea35'>tests</a>/<a href='/guix/log/gnu/tests/telephony.scm?id=7bdd76c888e47551aac23031a4a97d7000d1ea35'>telephony.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/tests/telephony.scm?id=7bdd76c888e47551aac23031a4a97d7000d1ea35&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-05-06 17:12:45 +0200'>2023-05-06</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=f51888272558d98cf5c196b93fb6c499056fbf6c'>tests: Add missing module imports for marionette-evaluated code.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-09-26 15:52:35 -0400'>2022-09-26</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=28a50eeac796d1b45200746cc685c7e20413d05c'>tests: telephony: Add missing import to fix jami tests.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-24 00:22:19 -0400'>2022-09-24</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=35e8615d387b6630006ccd8c3420154dab93b95a'>Revert "tests: telephony: Add extra packages to %jami-os for debugging."</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-23 23:56:16 -0400'>2022-09-23</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=fd109c5c09ea836dcd0c7294263cf93ef4dac79d'>tests: jami-provisioning: Fix test derivation name.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-23 23:56:15 -0400'>2022-09-23</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=829c19142e62efa7ba9715fc682b4be959830b2e'>tests: telephony: Add extra packages to %jami-os for debugging.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-08-01 12:49:44 -0400'>2022-08-01</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=f5cc7d03a778f20e2ad487e2c17cc8853bc871f0'>gnu: telephony: Add a Jami test for a partially defined jami-account.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-06-10 23:52:33 -0400'>2022-06-10</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=85b4dabd94d53f8179f31a42046cd83fc3a352fc'>services: jami: Modernize to adjust to Shepherd 0.9+ changes.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-01-13 00:57:52 -0500'>2022-01-13</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=374fea0f3bc8035f626cb29e6045130df9ffdaf8'>services: Adjust the jami service for the upgraded jami.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-09-26 23:20:56 +0200'>2021-09-26</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=89b05442933d92f4b21c3294455a498e8333727d'>tests: Reduce boilerplate for users of 'system-test-runner'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-09-25 18:52:05 +0200'>2021-09-25</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=1fb75128a5202b406622da6272bc809c46d1f439'>tests: Adjust to SRFI-64 as found in Guile 3.0.7.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-08-29 01:05:26 -0400'>2021-08-29</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=da4e40948326387d5bcda58783914d5f9ce8b095'>Migrate to the new 'targets' field of bootloader-configuration.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-08-02 17:23:30 -0400'>2021-08-02</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=10f554700c417b84c22c56fdd007567a52c45d75'>Reinstate "services: Add a service for Jami."</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-08-02 15:48:59 -0400'>2021-08-02</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=4673f817938d9d2b1b40a072ab2e0c44a32ccc97'>Revert "services: Add a service for Jami."</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-08-02 15:15:02 -0400'>2021-08-02</span></td><td><a href='/guix/commit/gnu/tests/telephony.scm?id=69dcc24c9f0cdfea674eb690e7755d26a25ced2b'>services: Add a service for Jami.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>