[PATCH] PPCallbacksTest expansion - part 1

[Kim Gräsman]

  I don't know my way around FileCheck, so I can't spek to the benefit for testing (it sounds nice, though), but a standalone tool would be useful for learning and troubleshooting, PPCallbacks just like -ast-dump is for AST traversals. I literally started writing one a few nights ago, but I never have enough free time to finish anything :-/

  I would appreciate it, is what I'm trying to say.

http://llvm-reviews.chandlerc.com/D1966