Move DEBUG to Debug.h

llvm-svn: 7497
diff --git a/llvm/lib/CodeGen/RegAllocSimple.cpp b/llvm/lib/CodeGen/RegAllocSimple.cpp
index 31b6374..4d286d9 100644
--- a/llvm/lib/CodeGen/RegAllocSimple.cpp
+++ b/llvm/lib/CodeGen/RegAllocSimple.cpp
@@ -14,6 +14,7 @@
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetMachine.h"
+#include "Support/Debug.h"
 #include "Support/Statistic.h"
 #include <iostream>