Until the needed surgery is done to remove gettext support from the
internal glib (since pkg-config doesn't need it), make sure that libintl
is linked in when necessary.
We just want to be able to build glib from the within the pkg-config
tree. Everything else is just extra weight and is better used from an
actual glib checkout. Unnecessary files include:
* documentation
* translations
* tests
* ChangeLogs
* non-autotools win32 build files
* various other build and/or internal files
