nativesdk-glib-2.0 doesn't build-depend on nativesdk-gettext, but all variations
need to depend on gettext-native as they need msgfmt (so gettext-minimal-native
isn't an option).
Also add virtual/libintl as glib explicitly needs this. Generally this is
provided by glibc but some platforms (such as MinGW) don't.
Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
