Disable creation of /var and /etc

--- a/Makefile.am	2020-03-08 16:57:09.511535600 +0100
+++ b/Makefile.am	2020-04-21 11:36:49.827182272 +0200
@@ -2376,16 +2376,6 @@
 endif
 
 install-exec-hook:
-	$(mkinstalldirs) $(DESTDIR)$(localstatedir)/run
-	$(mkinstalldirs) $(DESTDIR)$(localstatedir)/lib/$(PACKAGE_NAME)
-	$(mkinstalldirs) $(DESTDIR)$(localstatedir)/log
-	$(mkinstalldirs) $(DESTDIR)$(sysconfdir)
-	if test -e $(DESTDIR)$(sysconfdir)/collectd.conf; \
-	then \
-		$(INSTALL) -m 0640 $(builddir)/src/collectd.conf $(DESTDIR)$(sysconfdir)/collectd.conf.pkg-orig; \
-	else \
-		$(INSTALL) -m 0640 $(builddir)/src/collectd.conf $(DESTDIR)$(sysconfdir)/collectd.conf; \
-	fi; \
 	$(mkinstalldirs) $(DESTDIR)$(cpkgdatadir)
 	$(INSTALL) -m 0644 $(srcdir)/src/types.db $(DESTDIR)$(cpkgdatadir)/types.db;
 	$(INSTALL) -m 0644 $(srcdir)/src/postgresql_default.conf \
' value='switch'/></form></td></tr>
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<div class='path'>path: <a href='/guix/log/?id=4688c9f52d0f998add29049606db5e7b0655c8eb'>root</a>/<a href='/guix/log/gnu?id=4688c9f52d0f998add29049606db5e7b0655c8eb'>gnu</a>/<a href='/guix/log/gnu/build?id=4688c9f52d0f998add29049606db5e7b0655c8eb'>build</a>/<a href='/guix/log/gnu/build/bootloader.scm?id=4688c9f52d0f998add29049606db5e7b0655c8eb'>bootloader.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/build/bootloader.scm?id=4688c9f52d0f998add29049606db5e7b0655c8eb&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-11-03 07:59:59 +0100'>2020-11-03</span></td><td><a href='/guix/commit/gnu/build/bootloader.scm?id=a38d861e571c952f78ca588b50bdcc4adcb0c88c'>system: reconfigure: Use the disk-installer if provided.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-10-05 11:10:35 +0200'>2020-10-05</span></td><td><a href='/guix/commit/gnu/build/bootloader.scm?id=b97b423e3f61c80d5877dadc95b3f316cd61788f'>bootloader: Fix u-boot installation.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2020-05-05 16:08:33 +0200'>2020-05-05</span></td><td><a href='/guix/commit/gnu/build/bootloader.scm?id=f8fd1157174fd523d36dcfa756c965a54c30d5ae'>build: bootloader: Add install-efi procedure.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2019-06-17 16:13:36 +0200'>2019-06-17</span></td><td><a href='/guix/commit/gnu/build/bootloader.scm?id=45d46223f92b0933aaf9b1392a21d09eaa1e2881'>utils: Add 'invoke/quiet'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-03-16 18:15:13 +0100'>2019-03-16</span></td><td><a href='/guix/commit/gnu/build/bootloader.scm?id=f0cc5e7e1e4c03af29c5d4855dc5962502c49147'>booloader: Add 'invoke/quiet'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-15 11:52:38 +0100'>2017-12-15</span></td><td><a href='/guix/commit/gnu/build/bootloader.scm?id=e22482038611a53a9d2b25df20363664cd91be2e'>bootloader: Factorize write-file-on-device.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>