adding comment

Author: kavon

lib/Sema/TypeCheckDeclPrimary.cpp

@@ -2563,6 +2563,7 @@ class DeclChecker : public DeclVisitor<DeclChecker> {
       }
     }
 
+    // FIXME(kavon): see if these can be integrated into other parts of Sema
     diagnoseCopyableTypeContainingMoveOnlyType(ED);
     diagnoseMoveOnlyNominalDeclDoesntConformToProtocols(ED);