Fix jsdoc crash with @implements
Fix jsdoc crash with @implements

When a class @implements something specific, but also overrides a
low-level Object method like toString(), jsdoc would throw an
exception.  This fixes jsdoc so we do not have to add strange
workarounds to the annotations themselves.

Change-Id: If01d6ca58d66bad87f90d6644f561665a5b3004d

shaka-project/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,vimond/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,tvoli/shaka-player