Report the apptest fixture name for isolated fixture crashes.
Report specific Suite.Fixture crashes instead of mojo:foo_apptest.
Better than reporting 'mojo:foo_apptests' for each of 10 fixtures, eg.:
http://build.chromium.org/p/chromium.mojo/builders/Chromium%20Mojo%20Windows/builds/58/steps/app_tests/logs/stdio
TODO: Similar reporting (and avoid crashing fixtures) when not isolated.
BUG=509880
TEST=Better logging for apptest crashes on isolated fixtures.
R=sky@chromium.org
Review URL: https://codereview.chromium.org/
1275123002
Cr-Commit-Position: refs/heads/master@{#342228}