Author: Tim Hunt
MDL-27639 add two missing language strings.
Without these strings, important information for debugging is not displayed.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b8882c133467da26a9bddec4adf7d6ac88355f48
http://github.com/moodle/moodle/commit/b8882c133467da26a9bddec4adf7d6ac88355f48
+ 2.1 en [restore_path_element_missingmethod,core_error]
+ 2.1 en [restore_path_element_noobject,core_error]