These tests use the same main function as end2end_tests. Add the
register function stub so the compilation works correctly in standalone
and component builds.
Bug: angleproject:4449
Change-Id: Ib1558a596b9a558b16a7c5b7bfccc1e495a67e39
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2082135Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
