Include LineTerminatorSequence in TemplateElement cooked values

The 2013-09-27 draft of the ES6 draft, section 11.8.6, now says "The TV of TemplateCharacter :: LineTerminatorSequence is the TRV of LineTerminatorSequence."

https://code.google.com/p/esprima/issues/detail?id=456
Merge remote-tracking branch 'upstream/harmony' into harmony