ES2015 transforms accessors with captured `this`
ES2015 transforms accessors with captured `this`

Previously, it did not, meaning that the emit for lexically captured
`this` was incorrect.

kpreisser/TypeScript,mihailik/TypeScript,minestarks/TypeScript,synaptek/TypeScript,nojvek/TypeScript,mihailik/TypeScript,nojvek/TypeScript,donaldpipowitch/TypeScript,mihailik/TypeScript,minestarks/TypeScript,synaptek/TypeScript,microsoft/TypeScript,chuckjaz/TypeScript,nojvek/TypeScript,weswigham/TypeScript,basarat/TypeScript,kitsonk/TypeScript,RyanCavanaugh/TypeScript,kpreisser/TypeScript,TukekeSoft/TypeScript,microsoft/TypeScript,chuckjaz/TypeScript,weswigham/TypeScript,basarat/TypeScript,mihailik/TypeScript,donaldpipowitch/TypeScript,TukekeSoft/TypeScript,alexeagle/TypeScript,chuckjaz/TypeScript,kitsonk/TypeScript,synaptek/TypeScript,TukekeSoft/TypeScript,SaschaNaz/TypeScript,donaldpipowitch/TypeScript,Microsoft/TypeScript,kpreisser/TypeScript,Eyas/TypeScript,minestarks/TypeScript,donaldpipowitch/TypeScript,basarat/TypeScript,alexeagle/TypeScript,SaschaNaz/TypeScript,microsoft/TypeScript,kitsonk/TypeScript,Microsoft/TypeScript,nojvek/TypeScript,RyanCavanaugh/TypeScript,basarat/TypeScript,Eyas/TypeScript,synaptek/TypeScript,Eyas/TypeScript,RyanCavanaugh/TypeScript,chuckjaz/TypeScript,alexeagle/TypeScript,Eyas/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,weswigham/TypeScript,SaschaNaz/TypeScript