Add missing #if USE_MCJIT header guard. Clean up debugging message.

Change-Id: I110b9d57985e817b3d29bc905dc834a142ee069b
diff --git a/lib/ExecutionEngine/Compiler.h b/lib/ExecutionEngine/Compiler.h
index ecd7235..5018db3 100644
--- a/lib/ExecutionEngine/Compiler.h
+++ b/lib/ExecutionEngine/Compiler.h
@@ -22,7 +22,9 @@
 #include "CodeEmitter.h"
 #include "CodeMemoryManager.h"
 
+#if USE_MCJIT
 #include "librsloader.h"
+#endif
 
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/StringRef.h"