[t:2744], add progress info stating when we abort, fix on main

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@21292 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/ha_tokudb.cc

@@ -6540,6 +6540,8 @@ cleanup:
         tmp_cursor = NULL;
     }
     if (loader != NULL) {
+        sprintf(status_msg, "aborting creation of indexes.");
+        thd_proc_info(thd, status_msg);
         loader->abort(loader);
     }
     if (txn) {