mumble.pri: use freebsd (mkspec) to check whether we're on FreeBSD, rather than checking the uname.
mumble.pri: use freebsd (mkspec) to check whether we're on FreeBSD, rather than checking the uname.

LuAPi/mumble,Lartza/mumble,Lartza/mumble,SuperNascher/mumble,LuAPi/mumble,unascribed/mumble,LuAPi/mumble,LuAPi/mumble,Lartza/mumble,austinliou/mumble,LuAPi/mumble,unascribed/mumble,Lartza/mumble,unascribed/mumble,Lartza/mumble,SuperNascher/mumble,unascribed/mumble,SuperNascher/mumble,SuperNascher/mumble,SuperNascher/mumble,austinliou/mumble,SuperNascher/mumble,SuperNascher/mumble,LuAPi/mumble,SuperNascher/mumble,Lartza/mumble,austinliou/mumble,LuAPi/mumble,unascribed/mumble,LuAPi/mumble,austinliou/mumble,Lartza/mumble,SuperNascher/mumble,unascribed/mumble,Lartza/mumble,unascribed/mumble,austinliou/mumble,LuAPi/mumble,austinliou/mumble,unascribed/mumble,austinliou/mumble,austinliou/mumble