Annotate dump() methods with LLVM_DUMP_METHOD, addressing Richard Smith r259192 post commit comment.
clang part in r259232, this is the LLVM part of the patch.

llvm-svn: 259240
diff --git a/llvm/lib/MC/SubtargetFeature.cpp b/llvm/lib/MC/SubtargetFeature.cpp
index 7cce0fe..2e63f1e 100644
--- a/llvm/lib/MC/SubtargetFeature.cpp
+++ b/llvm/lib/MC/SubtargetFeature.cpp
@@ -284,7 +284,7 @@
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
 /// dump - Dump feature info.
 ///
-void SubtargetFeatures::dump() const {
+LLVM_DUMP_METHOD void SubtargetFeatures::dump() const {
   print(dbgs());
 }
 #endif