[PATCH] Make clang-format editor integration files part of install target

[Hans Wennborg]

  > This would install it to <root>/tools on Unices, right? That seems non-standard and undesirable. Maybe <root>/share/clang[/version] ?

  Yeah, share/clang/ sounds good to me. I'll update the patch and wait to hear what Daniel says.

http://llvm-reviews.chandlerc.com/D2154