[PATCH] Refactor parseFile API to use LinkerInput directly

[Shankar Kalpathi Easwaran]

  We agreed on LinkerInput/InputFiles to be removed and the LinkerInput functionality directly embedded in the FileNode.

  http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-September/065347.html

http://llvm-reviews.chandlerc.com/D1598