Add isInAnonymousNamespace() to the dynamic AST matchers

This was added to the static matchers in
125ccd3, but the dynamic matcher was
missed. This adds the dynamic matcher to the list.

clang/lib/ASTMatchers/Dynamic/Registry.cpp

@@ -428,6 +428,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(isPrivateKind);
   REGISTER_MATCHER(isFirstPrivateKind);
   REGISTER_MATCHER(isImplicit);
+  REGISTER_MATCHER(isInAnonymousNamespace);
   REGISTER_MATCHER(isInStdNamespace);
   REGISTER_MATCHER(isInTemplateInstantiation);
   REGISTER_MATCHER(isInitCapture);