glbench: Add .gitignore file.

BUG=None
TEST=None

Change-Id: Idf3f0219670447afb636db077566a82cdc725b74
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/glbench/+/1877688
Tested-by: David Riley <davidriley@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Commit-Queue: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Po-Hsien Wang <pwang@chromium.org>
1 file changed