CMake: Improve installation of Clang

  - Install clang-cc into libexec
  - Install headers into lib/clang/<version>/include
  - Don't install other clang-based tools (clang-wpa, clang-index, etc.)



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@79827 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed