glbench: Add OWNERS file

This CL is populating OWNERS file based on the candidates in the Chrome OS OWNERS status sheet.

BUG=b:132095048
TEST=None

Change-Id: Ia3cb845ccde599a2417ced226de28c0c38b4db61
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/glbench/+/1682786