pidgin/pidgin

06dcfb1cc1b2
Set XDG_CONFIG_DIR for all unittests so they can run in a silo

Testing Done:
Ran the tests and make sure they kept working without issue.

Reviewed at https://reviews.imfreedom.org/r/1587/
i18n = import('i18n')
# use the glib preset which is defined at
# https://github.com/mesonbuild/meson/blob/master/mesonbuild/modules/i18n.py#L93
# at the time of this comment.
i18n.gettext('pidgin', preset : 'glib')