Chakra should throw TypeError when try to set property of an object which has only a getter

Hi everyone,
I found an inconsistency when we try to set a getter-only property of an object.

OS: Ubuntu 16.04 x86
Chakra: 1.9

Step to reproduce:
```
try{
var a = {get "0"() {return 1;}, length: 1};
[].fill.call(a, 2);
throw new Error("should not reach this point")
}
catch(error){
if (!(error instanceof TypeError)) throw new Error('Should throw TypeError')
}
```
Actual results:
Error: Should throw TypeError

Expected results:
pass without errors

V8, SpiderMonkey and JavascriptCore throws a TypeError when attempted to assign to readonly property.

cinfuzz

Start by running the provided getter-only property reproduction against ChakraCore and tracing Array.prototype.fill through the engine's property-assignment handling. Compare the result with the expected JavaScript accessor semantics and add a regression test showing that filling the object throws TypeError.

Written by the indexing model from the issue text.