Annotate dump() methods with LLVM_DUMP_METHOD, addressing Richard Smith r259192 post commit comment.

llvm-svn: 259232
diff --git a/clang/lib/Serialization/GlobalModuleIndex.cpp b/clang/lib/Serialization/GlobalModuleIndex.cpp
index af5f94a..581e894 100644
--- a/clang/lib/Serialization/GlobalModuleIndex.cpp
+++ b/clang/lib/Serialization/GlobalModuleIndex.cpp
@@ -354,7 +354,7 @@
   std::fprintf(stderr, "\n");
 }
 
-void GlobalModuleIndex::dump() {
+LLVM_DUMP_METHOD void GlobalModuleIndex::dump() {
   llvm::errs() << "*** Global Module Index Dump:\n";
   llvm::errs() << "Module files:\n";
   for (auto &MI : Modules) {