Add #include raw_ostream.h in lib/Target/R600/SIFixSGPRCopies.cpp

This was casuing my release+asserts build on Windows to fail.

llvm-svn: 194747

llvm/lib/Target/R600/SIFixSGPRCopies.cpp

@@ -72,6 +72,7 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetMachine.h"
 
 using namespace llvm;