Author: Andrew Robert Nicols
MDL-38391 lib: Add missing string for YUI cachedef
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ad00331ebd8ef539b81568b101539a74f3dcb64d
http://github.com/moodle/moodle/commit/ad00331ebd8ef539b81568b101539a74f3dcb64d
+ 2.5 en [cachedef_yuimodules,core_cache]