meson: link cms-colord with glib and gobject

cms-colord.c calls things like g_string_free() and g_object_unref(), so it
needs to link glib-2.0 and gobject-2.0 explicitly, instead of relying on colord
pkg-config bringing them in.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>