Run CDjs as part of JSC stress testing

Run CDjs as part of JSC stress testing
https://bugs.webkit.org/show_bug.cgi?id=146174

Reviewed by Geoffrey Garen.

PerformanceTests:

* JetStream/cdjs/cdjs-tests.yaml: Added. This tells JSC stress tests what tests to run. It uses new syntax ("tests" being a list) that I add in this change.
* JetStream/cdjs/main.js: Mark this as a slow test.
* JetStream/create.rb: Don't copy the JSC stress tests artifacts into the JetStream bundle.

Tools:

* Scripts/run-javascriptcore-tests:
(runJSCStressTests): Make this aware of the cdjs-tests.yaml.
* Scripts/run-jsc-stress-tests:
- Teach this about tests that indicate error by returning an error code while also having lots of output even when they succeed.
- Add the ability to have "tests" be a list of tests rather than just one test. This could also be a list of directories that have tests.
- Fix a bug with bundle copying: whether the $collection should have the basename appended depends on whether we copy into bundleDir.dirname, not on whether absoluteCollection is a directory.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@185833 268f45cc-cd09-0410-ab3c-d52691b4dbfc