compiler_wrapper: Fix rusage_flag permission error

Seeing permission errors in builder bots that create rusage_flags.
We need to set the Umask to 0 during creation of the directory.

BUG=chromium:1156314
TEST=None

Change-Id: I667d922762c2cb090adbb3abac2d4782bc48b87d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2597478
Reviewed-by: George Burgess <gbiv@chromium.org>
Reviewed-by: Tiancong Wang <tcwang@google.com>
Tested-by: Ryan Beltran <ryanbeltran@chromium.org>
Commit-Queue: Ryan Beltran <ryanbeltran@chromium.org>
1 file changed