Make nsISupports interfaces threadsafe so proxy objects can be created. r=waterson

rdf/base/src/nsRDFService.cpp

@@ -542,9 +542,9 @@ RDFServiceImpl::GetRDFService(nsIRDFService** mgr)
 }
 
 
-NS_IMPL_ADDREF(RDFServiceImpl);
-NS_IMPL_RELEASE(RDFServiceImpl);
-NS_IMPL_QUERY_INTERFACE(RDFServiceImpl, kIRDFServiceIID);
+NS_IMPL_THREADSAFE_ADDREF(RDFServiceImpl);
+NS_IMPL_THREADSAFE_RELEASE(RDFServiceImpl);
+NS_IMPL_THREADSAFE_QUERY_INTERFACE(RDFServiceImpl, kIRDFServiceIID);
 
 
 NS_IMETHODIMP