drirc: Enable glthread for more games (Saints Row 4 & Gat out of Hell).
“Saints Row: Gat out of Hell” benefits from this on slower CPUs in that
usage spikes on individual cores are avoided, which in turn makes it harder
to hit a bug which causes broken audio and the game to hang on exit.
“Saints Row IV” appears to be fine either way, but also exhibits the audio
breakage bug: glthread is therefore being enabled on the grounds that it should
make it a little harder to hit that bug.
Signed-off-by: Marek Olšák <marek.olsak@amd.com>