Modify CodeEmitter due to upstream API changes.

Upstream changed the API of mpTarget->createMCInstPritner.
Apply changes of csmon to migrate to llvm upstream r129128. More CLs coming next.

Change-Id: I1d8f840f6564431374fde7be9e09cd0ddac88e8e
diff --git a/lib/CodeGen/CodeEmitter.h b/lib/CodeGen/CodeEmitter.h
index 8d34159..c4e0d78 100644
--- a/lib/CodeGen/CodeEmitter.h
+++ b/lib/CodeGen/CodeEmitter.h
@@ -82,6 +82,8 @@
 
     CodeMemoryManager *mpMemMgr;
 
+    llvm::TargetMachine *mpTargetMachine;
+
     // The JITInfo for the target we are compiling to
     const llvm::Target *mpTarget;