macOS V2 Sandbox: Allow lsd.modifydb in GPU v2 sandbox.

Bug: 871280
Change-Id: I725bb3f2dc629b85c64bd35a931804fe85bb729c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1582778
Commit-Queue: Greg Kerr <kerrnel@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Auto-Submit: Greg Kerr <kerrnel@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653789}
1 file changed