Make ValueEnumerator::print use OS for metadata too. Noticed by inspection.

llvm-svn: 224404
diff --git a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
index c90dfbd..2c0fdc0 100644
--- a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
+++ b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
@@ -459,7 +459,7 @@
   for (auto I = Map.begin(), E = Map.end(); I != E; ++I) {
     const Metadata *MD = I->first;
     OS << "Metadata: slot = " << I->second << "\n";
-    MD->dump();
+    MD->print(OS);
   }
 }
 
@@ -803,4 +803,3 @@
   IncorporateFunctionInfoGlobalBBIDs(BB->getParent(), GlobalBasicBlockIDs);
   return getGlobalBasicBlockID(BB);
 }
-