Merge System into Support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-extract/llvm-extract.cpp b/tools/llvm-extract/llvm-extract.cpp
index b5af6bc..8c2f43a 100644
--- a/tools/llvm-extract/llvm-extract.cpp
+++ b/tools/llvm-extract/llvm-extract.cpp
@@ -25,7 +25,7 @@
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/ToolOutputFile.h"
 #include "llvm/Support/SystemUtils.h"
-#include "llvm/System/Signals.h"
+#include "llvm/Support/Signals.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include <memory>
 using namespace llvm;