Merge System into Support.

llvm-svn: 120297
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 0940362..a43d0d3 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -35,8 +35,8 @@
 #include "clang/Basic/Diagnostic.h"
 #include "llvm/ADT/StringSet.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/System/Host.h"
-#include "llvm/System/Path.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Timer.h"
 #include <cstdlib>