glib: Remove usage of gettext/libintl/iconv

pkg-config doesn't use message translation, so there's no need to build
it into the bundled glib. Furthermore, when not using glibc, this drags
in extra dependencies on gettext, libintl and iconv. Remove their usage
in two steps:

1. Don't include libintl.h directly from code. glibintl.h
conditionalizes the include of libintl.h based on the ENABLE_NLS define
and creates fallback macros when it's unwanted.

2. Remove the usage of the gettext macros in glib's configure.ac. This
ensures that the unwanted dependencies aren't searched for. Two defines
are kept around to keep the code happy.

glib-patches/no-gettext.patch

@@ -0,0 +1,42 @@
+diff --git a/glib/configure.ac b/glib/configure.ac
+index a78d516..8ac9631 100644
+--- a/glib/configure.ac
++++ b/glib/configure.ac
+@@ -455,23 +455,12 @@ dnl
+ dnl gettext support
+ dnl
+ 
+-GLIB_GNU_GETTEXT
+-
+-if test "$gt_cv_have_gettext" != "yes" ; then
+-  AC_MSG_ERROR([
+-*** You must have either have gettext support in your C library, or use the 
+-*** GNU gettext library. (http://www.gnu.org/software/gettext/gettext.html
+-])
+-fi
+-
+-LIBS="$INTLLIBS $LIBS"
+-
+ GETTEXT_PACKAGE=glib20
+ AC_SUBST(GETTEXT_PACKAGE)
+ AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, ["$GETTEXT_PACKAGE"], 
+   [Define the gettext package to be used])
+ 
+-GLIB_DEFINE_LOCALEDIR(GLIB_LOCALE_DIR)
++AC_DEFINE_UNQUOTED([GLIB_LOCALE_DIR], [""], [Dummy catalog directory])
+ 
+ dnl
+ dnl Now we are done with gettext checks, figure out ICONV_LIBS
+diff --git a/glib/glib/ggettext.c b/glib/glib/ggettext.c
+index ff1bb6b..c2d1ad5 100644
+--- a/glib/glib/ggettext.c
++++ b/glib/glib/ggettext.c
+@@ -40,7 +40,7 @@
+ 
+ #include <string.h>
+ #include <locale.h>
+-#include <libintl.h>
++#include "glibintl.h"
+ 
+ #ifdef G_OS_WIN32
+ 

glib-patches/patchlist

@@ -3,5 +3,6 @@ no-installed-files.patch
 foreign-automake.patch
 no-gregex.patch
 no-pkg-config.patch
+no-gettext.patch
 cross-compiling.patch
 static-only.patch

glib/configure.ac

@@ -455,23 +455,12 @@ dnl
 dnl gettext support
 dnl
 
-GLIB_GNU_GETTEXT
-
-if test "$gt_cv_have_gettext" != "yes" ; then
-  AC_MSG_ERROR([
-*** You must have either have gettext support in your C library, or use the 
-*** GNU gettext library. (http://www.gnu.org/software/gettext/gettext.html
-])
-fi
-
-LIBS="$INTLLIBS $LIBS"
-
 GETTEXT_PACKAGE=glib20
 AC_SUBST(GETTEXT_PACKAGE)
 AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, ["$GETTEXT_PACKAGE"], 
   [Define the gettext package to be used])
 
-GLIB_DEFINE_LOCALEDIR(GLIB_LOCALE_DIR)
+AC_DEFINE_UNQUOTED([GLIB_LOCALE_DIR], [""], [Dummy catalog directory])
 
 dnl
 dnl Now we are done with gettext checks, figure out ICONV_LIBS

glib/glib/ggettext.c

@@ -40,7 +40,7 @@
 
 #include <string.h>
 #include <locale.h>
-#include <libintl.h>
+#include "glibintl.h"
 
 #ifdef G_OS_WIN32