Merge System into Support.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120297 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndexer.cpp b/tools/libclang/CIndexer.cpp
index 95949b8..992d76a 100644
--- a/tools/libclang/CIndexer.cpp
+++ b/tools/libclang/CIndexer.cpp
@@ -25,7 +25,7 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Program.h"
+#include "llvm/Support/Program.h"
 
 #include <cstdio>
 #include <vector>