Fix git call syntax in commit_id.bat

BUG=angle:566

Change-Id: I437bdec916dbfe12cb310a20d4f38c18072eacd0
Reviewed-on: https://chromium-review.googlesource.com/187210
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Shannon Woods <shannonwoods@chromium.org>
(cherry picked from commit aacedfcffbca780c56dda2ab03ee07faccf0fbec)
Reviewed-on: https://chromium-review.googlesource.com/187201
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
1 file changed