Test results will now be prepended with [TESTSTATS], and there are two
new outputs added for unexpected passes and unexpected failures.
Bug: angleproject:3369
Change-Id: Iec4dafe695531dcf56d496083036ccf1e286ead7
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1571388
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
