Fix Clang install rules to not set permissions on include/

The CMake install(DIRECTORY) command documents that it sets permissions
on directories it is asked to install.  Since the <prefix>/include
directory may not be exclusive to the LLVM/Clang installation, we should
not ask CMake to manage permissions of that directory for us.  Instead,
give only our own include/clang and include/clang-c subdirectories to
the install(DIRECTORY) command.

Fixes PR4500. Patch by Brad King.

llvm-svn: 201076

clang/CMakeLists.txt

@@ -336,7 +336,7 @@ include_directories(BEFORE
   )
 
 if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-  install(DIRECTORY include/
+  install(DIRECTORY include/clang include/clang-c
     DESTINATION include
     FILES_MATCHING
     PATTERN "*.def"
@@ -345,7 +345,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
     PATTERN ".svn" EXCLUDE
     )
 
-  install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/
+  install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/include/clang
     DESTINATION include
     FILES_MATCHING
     PATTERN "CMakeFiles" EXCLUDE