freedreno/fdperf: set locale

Set local to get numbers printed w/ commas.. much easier to read that
way.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4119>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4119>
1 file changed