[CMake] Add missing set_output_directory after Takumi's change in r198205.

In a standalone build, Clang binaries should end up in Clang's build folder,
not LLVM's.

Xcode still has a few issues finding auxiliary tools and libraries in the
build folders. I'll fix those next.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@198328 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 41982d0..f635169 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -332,6 +332,7 @@
 macro(add_clang_executable name)
   add_llvm_executable( ${name} ${ARGN} )
   set_target_properties(${name} PROPERTIES FOLDER "Clang executables")
+  set_output_directory(${name} ${CLANG_RUNTIME_OUTPUT_INTDIR} ${CLANG_LIBRARY_OUTPUT_INTDIR})
 endmacro(add_clang_executable)
 
 include_directories(BEFORE