Track upstream changes

Author: davezarzycki

lib/IRGen/GenEnum.cpp

@@ -110,6 +110,7 @@
 #include "swift/AST/LazyResolver.h"
 #include "swift/IRGen/Linking.h"
 #include "swift/SIL/SILModule.h"
+#include "llvm/IR/CFG.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/GlobalVariable.h"
 #include "llvm/Analysis/CFG.h"