Release build: guard dump functions with "ifndef NDEBUG"

No functional change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163344 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/SubtargetFeature.cpp

@@ -368,11 +368,13 @@ void SubtargetFeatures::print(raw_ostream &OS) const {
   OS << "\n";
 }
 
+#ifndef NDEBUG
 /// dump - Dump feature info.
 ///
 void SubtargetFeatures::dump() const {
   print(dbgs());
 }
+#endif
 
 /// getDefaultSubtargetFeatures - Return a string listing the features
 /// associated with the target triple.