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
diff --git a/tools/clang-cc/CMakeLists.txt b/tools/clang-cc/CMakeLists.txt
index e224d40..85e4c7c 100644
--- a/tools/clang-cc/CMakeLists.txt
+++ b/tools/clang-cc/CMakeLists.txt
@@ -25,3 +25,6 @@
   clang-cc.cpp
   )
 add_dependencies(clang-cc clang-headers)
+
+install(TARGETS clang-cc
+  RUNTIME DESTINATION libexec)