NativeArray: Array.prototype.sort bug fixes (bug 728286)
NativeArray: Array.prototype.sort bug fixes (bug 728286)

- follow spec for 15.4.4.11  Array.prototype.sort more closely w.r.t undefined and not-defined properties

qhanam/rhino,qhanam/rhino,tntim96/rhino-apigee,qhanam/rhino,qhanam/rhino,tntim96/rhino-apigee,tntim96/rhino-apigee