meson: add support for generating translation mo files

Meson has handy a handy built-in module for handling gettext called
i18n, this module works a bit differently than our autotools build does,
namely it doesn't automatically generate translations instead it creates
3 new top level targets to run. These are:

xmlpool-pot
xmlpool-update-po
xmlpool-gmo

v2: - Add new files to autotools dist tarball

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

src/util/xmlpool/LINGUAS

@@ -0,0 +1 @@
+ca es de nl sv fr

src/util/xmlpool/Makefile.am

@@ -59,7 +59,9 @@ EXTRA_DIST = \
 	$(POS) \
 	$(MOS) \
 	SConscript \
-	meson.build
+	meson.build \
+	LINGUAS \
+	POTFILES
 
 BUILT_SOURCES = options.h
 CLEANFILES = \

src/util/xmlpool/POTFILES

@@ -0,0 +1 @@
+src/util/xmlpool/t_options.h

src/util/xmlpool/meson.build

@@ -35,3 +35,6 @@ xmlpool_options_h = custom_target(
   capture : true,
   depend_files : _langs_po_files,
 )
+
+i18n = import('i18n')
+i18n.gettext('xmlpool')