Add some failing tests of rejected promises.
Add some failing tests of rejected promises.

facebook/regenerator,liviuignat/regenerator,kittens/regenerator,juliocanares/regenerator,RReverser/js-goto-transpiler,liviuignat/regenerator,Jericho25/regenerator,Jericho25/regenerator,juliocanares/regenerator,sebmck/regenerator,rafaelstz/regenerator,RReverser/js-goto-transpiler,facebook/regenerator,sebmck/regenerator,rafaelstz/regenerator,kittens/regenerator,facebook/regenerator