[PATCH] CMake: enable building the clang-format vs plugin

[Josh Samuel]

  LLVM_TOOLS_BINARY_DIR doesn't appear to be the correct directory to copy from when building from the CMake generated Visual Studio solution.   It is copying the exe's to a subfolder of LLVM_TOOLS_BINARY_DIR that represents the build configuration (eg. bin\Release or bin\RelWithDebugInfo  )

http://llvm-reviews.chandlerc.com/D2310

COMMIT
  http://llvm-reviews.chandlerc.com/rL196299