bug 870370: EXTRA_COMPONENTS cleanup for conversion patches #1 & #2.
Bug 886101 - Only int32-specialized bitwise ops should be marked safe in parallel. (r=nmatsakis)
Bug 886102 - Ignore idempotency for parallel ICs. (r=nmatsakis)
Bug 887921 - Don't toggle GC write barriers in parallel execution. (r=sstangl)
Bug 888837 - Fix tagging of callee token in arguments rectifier. (r=jandem)
Bug 888470 - Sweep parallelStringConcatStub_. (r=djvj)
Bug 889825 - Eliminate more bounds checks when double arrays are used. r=h4writer