Improve Promise coverage: PerformPromiseAll & PeformPromiseRace

Coverage for length and name function properties

Note: Already uses the updated DataView function lengths from tc39/ecma262#266 (ES2016 Draft 2015-12-20)

Subclassing built-in objects

Improve Promise coverage: NewPromiseCapability

Improve Promise coverage: Promise Reject Function

Improve Promise coverage: Promise.prototype.then

Destructuring Binding - syntax and simple initialization

Add tests for instanceof operator when prototype property is primitive or getter

Object.{values,entries} tests