Log Message:
mate*: remove unintentional linkage against pkgsrc gettext-libs

As of 1.24, MATE requires GNU-specific msgfmt features. meta-pkgs/mate/
Makefile.common r. 1.10 expressed this tool dependency using
USE_BUILTIN.gettext=no, but this exposed pkgsrc gettext-libs in the
build environment as well, which some MATE packages then linked
against, but gettext-libs didn't end up being declared as a run-time
dependency, so binary package installations were broken (with the
workaround of manually installing the undeclared gettext-libs
dependency). Express this dependency differently, so GNU msgfmt is
used as a tool without exposing pkgsrc gettext-libs.

(The pkgsrc tooling infrastruture could be altered to provide a
distinct "gmsgfmt" tool, same with "gxgettext", and perhaps \ 
others.
Here I'm just immediately concerned with fixing this packaging issue.)

Addresses PR pkg/55503 by Jay Patel.