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
diff --git a/lib/MC/MCSymbol.cpp b/lib/MC/MCSymbol.cpp
index f7f9184..f60126b 100644
--- a/lib/MC/MCSymbol.cpp
+++ b/lib/MC/MCSymbol.cpp
@@ -76,6 +76,8 @@
   OS << '"' << getName() << '"';
 }
 
+#ifndef NDEBUG
 void MCSymbol::dump() const {
   print(dbgs());
 }
+#endif