This will make scripts have an easier time parsing metadata.

Bug: angleproject:5134
Change-Id: I4ee32374c8d54d8f91e7f5b8c69b4085e43d1832
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2500601Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>