[PATCH] [lld] Change interface to PassManager

[Michael Spencer]

  I really don't like this approach. It's lying about the parameter type. I would much rather we solve the base problem by creating a new MutableFile with a reference to the File needed that just adds all the pointers to atoms to its atom arrays. This is fast and models the behavior correctly.

http://llvm-reviews.chandlerc.com/D1967