[PATCH] Initial commit for the llvm-dsymutil tool.

[Frederic Riss]

ping!

I committed this briefly this morning considering that I could count your silence as approval, but Chandler told me not to do so. Sorry about that, I really didn't mean to force anything through.

My patch's short but intense in-tree live has produced one bot failure: http://bb.pgr.jp/builders/cmake-llvm-x86_64-linux/builds/19112
It seems the llvm-dsymutil tool hasn't been built at all there, thus I must be missing something in the build system hooks. I tried cmake and configure builds in Debug/Release before committing,  so I'm not sure what I screwed up.

Thanks!

http://reviews.llvm.org/D6242