Apply changes to sync with llvm upstream.
diff --git a/lib/CodeGen/CodeEmitter.cpp b/lib/CodeGen/CodeEmitter.cpp
index 43e508d..7acedb5 100644
--- a/lib/CodeGen/CodeEmitter.cpp
+++ b/lib/CodeGen/CodeEmitter.cpp
@@ -54,7 +54,7 @@
 #include "llvm/Support/MemoryObject.h"
 #endif
 
-#include "llvm/System/Host.h"
+#include "llvm/Support/Host.h"
 
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"