"opt" is not being built with ASan, so the IR-level ARC optimizer tests
won't work.
DebugInfo/variables-repl.swift seems to be passing, possibly because we're
not using the SwiftASTStreamerPass when we generate debug info anymore.
stdlib/NewString.swift is still failing; we're not seeing the expected
capacity for a particular string.
Swift SVN r13833
This was not likely an error-free change. Where you see problems
please correct them. This went through a fairly tedious audit
before committing, but comments might have been changed incorrectly,
not changed at all, etc.
Swift SVN r7631