gnu: texi2html: Fix tests in the absense of gettext.

* gnu/packages/patches/texi2html-i18n.patch: New patch.
* gnu/packages/texinfo.scm (texi2html)[source]: Use it.
* gnu-system.am (dist_patch_DATA): Add it.

gnu-system.am

@@ -378,6 +378,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/tcsh-fix-autotest.patch			\
   gnu/packages/patches/teckit-cstdio.patch			\
   gnu/packages/patches/texi2html-document-encoding.patch	\
+  gnu/packages/patches/texi2html-i18n.patch			\
   gnu/packages/patches/udev-gir-libtool.patch			\
   gnu/packages/patches/util-linux-perl.patch			\
   gnu/packages/patches/valgrind-glibc.patch			\

gnu/packages/patches/texi2html-i18n.patch

+Do not try to regenerate po files; use the reference files that are packaged
+in the tarball.
+
+--- a/Makefile.in	2010-06-30 17:02:28.000000000 -0500
++++ b/Makefile.in	2014-08-16 00:22:38.447050269 -0500
+@@ -1022,15 +1022,7 @@
+ 
+ i18n/en.thl i18n/: $(po_document_dir)/po_document/$(PACKAGE)_document.pot
+ 	$(MKDIR_P) i18n
+-	if test '$(USE_NLS)' = 'yes'; then \
+-	  for file in "$(srcdir)/$(po_document_dir)/po_document/"*".po"; do lang=`basename "$$file" .po | sed 's/\..*//'`; \
+-		test "$$lang" = 'en' && continue; \
+-		msgexec -i "$$file" "$(srcdir)/gettext_to_separated.pl" | "$(srcdir)/separated_to_hash.pl" $$lang > i18n/$$lang.thl; \
+-	  done; \
+-	  msgexec -i $< "$(srcdir)/gettext_to_separated.pl" | "$(srcdir)/separated_to_hash.pl" en > i18n/en.thl; \
+-	else \
+-	  cp -p i18n_ref/*.thl i18n; \
+-	fi
++	cp -p i18n_ref/*.thl i18n
+ 
+ i18n_ref:
+ 	$(MKDIR_P) i18n_ref
+
+Have install-sh install .mo files locally for in-source tests, so that msgfmt
+is not needed.
+
+--- a/Makefile.in	2010-06-30 17:02:28.000000000 -0500
++++ b/Makefile.in	2014-08-16 00:22:38.447050269 -0500
+@@ -1052,19 +1044,8 @@
+ # update the po files, and install locally the .mo files for the in
+ # source tests
+ check-local: makeinfo.pl texi2any.pl
+-	if test '$(USE_NLS)' = 'yes'; then \
+-	  cd $(po_document_dir)/po_document && $(MAKE) $(AM_MAKEFLAGS) update-po; \
+-	fi
+-	rm -rf locales
+-	for file in "$(srcdir)/$(po_document_dir)/po_document/"*.po; do \
+-	  basename=`basename "$$file" .po` ; \
+-	  $(MKDIR_P) "locales/$$basename/LC_MESSAGES/" ; \
+-	  if test '$(USE_NLS)' = 'yes'; then \
+-	    $(MSGFMT) "$$file" -o "locales/$$basename/LC_MESSAGES/texi2html_document.mo" ; \
+-	  else \
+-	    cp -p "$(srcdir)/$(po_document_dir)/po_document/$$basename.mo" "locales/$$basename/LC_MESSAGES/texi2html_document.mo" ; \
+-	  fi; \
+-	done
++	$(MAKE) -C po_document localedir="$(abs_srcdir)/locales" install-data
++	$(MAKE) -C po_messages localedir="$(abs_srcdir)/locales" install-data
+ 
+ makeinfo.pl texi2any.pl:
+ 	-$(LN_S) $(srcdir)/texi2html.pl $@

gnu/packages/texinfo.scm

@@ -79,7 +79,8 @@ (define-public texi2html
                (base32
                 "1yprv64vrlcbksqv25asplnjg07mbq38lfclp1m5lj8cw878pag8"))
               (patches
-               (list (search-patch "texi2html-document-encoding.patch")))
+               (list (search-patch "texi2html-document-encoding.patch")
+                     (search-patch "texi2html-i18n.patch")))
               (snippet
                ;; This file is modified by the patch above, but reset its
                ;; timestamp so we don't trigger the rule to update PO files,