The test driver compares command-line arguments against test names
it finds on disk. Using Python's "fnmatch" for this nicely handles
wildcards, but is relatively slow. For given test names that don't
contain any '*', we can use string equality testing, which is much
faster.

Example: the time to evaluate

 tools/run-tests.py --arch x64 --mode release \
   $(grep 'object-spread' -l -r test/test262/data/test/ | \
       sed -E 's|\.js$||' | \
       sed -E 's|^test/test262/data/test/|test262/|')

goes from "I gave up and killed the process after several minutes"
to a couple of seconds with this patch.

Change-Id: I9ec404b7516afd801fe6126347f6dff533d1977c
Reviewed-on: https://chromium-review.googlesource.com/1149196
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54704}