Merge pull request #5562 from slavapestov/fix-builtin-reflection-metadata-3.0

IRGen: Don't emit reflection metadata for builtin types unless we're … [3.0]

Author: ematejska

lib/IRGen/GenReflection.cpp

@@ -180,7 +180,7 @@ class ReflectionMetadataBuilder : public ConstantBuilder<> {
   // Collect any builtin types referenced from this type.
   void addBuiltinTypeRefs(CanType type) {
     type.visit([&](Type t) {
-      if (t->is<BuiltinType>())
+      if (IGM.getSwiftModule()->isStdlibModule() && t->is<BuiltinType>())
         IGM.BuiltinTypes.insert(CanType(t));
 
       // We need size/alignment information for imported value types,