This replace the non-descriptive digit at the end of the test name by
the name of the dEQP test being run.

Reland, enabling the named tests only in standalone.

BUG=angleproject:1153

Change-Id: I1336d38425c19305fae8279a42d4931cc516215c
Reviewed-on: https://chromium-review.googlesource.com/304171Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>