Specifying the project name is now mandatory.  This helps avoid
accidentally referring to chromium bugs by forgetting the project name.
At the same time, it ensures the project name is not misspelled.

Bug: angleproject:4184
Change-Id: I6bbfe1751e2fd0baf424be38018374cce360df5d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1969067Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>