[PATCH] Add support for DebugFission to DWARF parser

[Alexey Samsonov]

  Oh, and I would appreciate advice on writing tests for split-dwarf. Looks like debug info in the binaries built with -gsplit-dwarf always contains absolute paths to .dwo files, so checking in pre-built binaries is problematic... Generating .dwo files requires a fresh enough objcopy. Also, building binaries from source (or bytecode) in test cases would make it hard to predict the resulting object file layout and build (input, expected output) pairs for llvm-symbolizer...

http://llvm-reviews.chandlerc.com/D1164