Autoroller for glslang was paused, breaking layer build.

Replaces: https://crrev/c//2119884

TBR: courtneygo@google.com

Bug: b:152298150
Bug: angleproject:4510
Change-Id: I6c431a76455c991cbbb8621050dbf74acf8eea41
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2121903Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Cody Northrop <cnorthrop@google.com>