Merge System into Support.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120297 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTReader.cpp b/lib/Serialization/ASTReader.cpp
index 39d538a..8673248 100644
--- a/lib/Serialization/ASTReader.cpp
+++ b/lib/Serialization/ASTReader.cpp
@@ -40,7 +40,7 @@
 #include "llvm/Bitcode/BitstreamReader.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "llvm/System/Path.h"
+#include "llvm/Support/Path.h"
 #include <algorithm>
 #include <iterator>
 #include <cstdio>