Autogenerate chromium.clang.json.

A couple of tiny diffs remain, compared to the original JSON file.
These were incorrect in their original state, so are being left as is.

This waterfall was difficult to autogenerate, as there were many
seemingly arbitrary exclusions of certain tests from entire groups of
machines. In order to avoid adding large copy-pastes of exclusion lists
to the exceptions, many one-off test suites were created that contain
only small numbers of tests. This will increase the maintenance burden
for test_suites.pyl. The plan is to merge these test suites back
together immediately after landing this CL, thereby running more tests
on the Clang waterfall, and unifying machines' configurations.

BUG=662541
NOTRY=true

Change-Id: I9c4efdbb919273124acf257c8722740fdf22a48d
Reviewed-on: https://chromium-review.googlesource.com/818075
Commit-Queue: Kenneth Russell <[email protected]>
Reviewed-by: Dirk Pranke <[email protected]>
Reviewed-by: John Budorick <[email protected]>
Cr-Commit-Position: refs/heads/master@{#522926}
5 files changed