Rename MDNode.h header. It defines MDnode and other metadata classes.
New name is Metadata.h.

llvm-svn: 77370
diff --git a/llvm/lib/VMCore/Verifier.cpp b/llvm/lib/VMCore/Verifier.cpp
index f900dca..06bc9e7 100644
--- a/llvm/lib/VMCore/Verifier.cpp
+++ b/llvm/lib/VMCore/Verifier.cpp
@@ -45,7 +45,7 @@
 #include "llvm/DerivedTypes.h"
 #include "llvm/InlineAsm.h"
 #include "llvm/IntrinsicInst.h"
-#include "llvm/MDNode.h"
+#include "llvm/Metadata.h"
 #include "llvm/Module.h"
 #include "llvm/ModuleProvider.h"
 #include "llvm/Pass.h"