This patch allows us to use glibc's build system to build locales
in a package separate from glibc.

  1. Use 'localedef' from $PATH since we are not rebuilding it.
  2. Use '--no-archive' to avoid building the big locale archive, and
     because the already-built 'localedef' would want to write it
     to '/run/current-system/locale', which is not possible.
  3. Pass $(inst_complocaledir)/$$locale to install files in the right
     place, and because otherwise, 'localedef' fails with:
     "cannot write output files to `(null)'".

--- glibc-2.22/localedata/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ glibc-2.22/localedata/Makefile	2015-09-25 14:18:34.698941752 +0200
@@ -195,7 +195,7 @@ INSTALL-SUPPORTED-LOCALES=$(addprefix in
 
 # Sometimes the whole collection of locale files should be installed.
 LOCALEDEF=I18NPATH=. GCONV_PATH=$(common-objpfx)iconvdata LC_ALL=C \
-$(rtld-prefix) $(common-objpfx)locale/localedef
+  localedef --no-archive
 install-locales: $(INSTALL-SUPPORTED-LOCALES)
 
 install-locales-dir:
@@ -212,7 +212,7 @@ $(INSTALL-SUPPORTED-LOCALES): install-lo
 	input=`echo $$locale | sed 's/\([^.]*\)[^@]*\(.*\)/\1\2/'`; \
 	$(LOCALEDEF) --alias-file=../intl/locale.alias \
 		     -i locales/$$input -c -f charmaps/$$charset \
-		     $(addprefix --prefix=,$(install_root)) $$locale \
+		     $(addprefix --prefix=,$(install_root)) $(inst_complocaledir)/$$locale \
 	&& echo ' done'; \
 
 tst-setlocale-ENV = LC_ALL=ja_JP.EUC-JP
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<tr><td><span title='2023-07-02 02:00:09 +0200'>2023-07-02</span></td><td><a href='/guix/commit/gnu/services/cgit.scm?id=820e32b556aa978827249ae4687c7423508c04b3'>services: cgit: Remove ‘cgit-repo’ left-overs.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-06-15 00:25:21 +0200'>2022-06-15</span></td><td><a href='/guix/commit/gnu/services/cgit.scm?id=8cb1a49a3998c39f315a4199b7d4a121a6d66449'>services: configuration: Use *unspecified* instead of 'disabled.</a><span class='msg-avail'>...</span></td><td>Attila Lendvai</td></tr>
<tr><td><span title='2021-11-30 01:08:55 +0100'>2021-11-30</span></td><td><a href='/guix/commit/gnu/services/cgit.scm?id=892f1b7273d57b25940700877a02618fe826cc08'>services: Accept &lt;inferior-package&gt;s in lieu of &lt;package&gt;s.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>