gnu: glibc-locales: Fix build.

* gnu/packages/patches/glibc-locales.patch: Adjust to glibc-2.23.
* gnu/packages/base.scm (glibc-locales)[arguments]:
Pass 'lib_cv_complocaledir'.

gnu/packages/base.scm

@@ -786,7 +786,7 @@ the 'share/locale' sub-directory of this package.")
          ((#:configure-flags flags)
           `(append ,flags
                    ;; Use $(libdir)/locale/X.Y as is the case by default.
-                   (list (string-append "libc_cv_localedir="
+                   (list (string-append "libc_cv_complocaledir="
                                         (assoc-ref %outputs "out")
                                         "/lib/locale/"
                                         ,(package-version glibc))))))))))

gnu/packages/patches/glibc-locales.patch

@@ -5,8 +5,8 @@ in a package separate from glibc.
   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 $(localedir)/$$locale to install files in the right place, and
-     because otherwise, 'localedef' fails with:
+  3. Pass $(inst_complocaledir)/$$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
@@ -25,7 +25,7 @@ in a package separate from glibc.
  	$(LOCALEDEF) --alias-file=../intl/locale.alias \
  		     -i locales/$$input -c -f charmaps/$$charset \
 -		     $(addprefix --prefix=,$(install_root)) $$locale \
-+		     $(addprefix --prefix=,$(install_root)) $(localedir)/$$locale \
++		     $(addprefix --prefix=,$(install_root)) $(inst_complocaledir)/$$locale \
  	&& echo ' done'; \
  
  tst-setlocale-ENV = LC_ALL=ja_JP.EUC-JP