dillon1000/react

Extra test case related to memoization "within" freeze

I found an interesting edge case in the previous diff with mutation of a value 
that appears in the expression of an object key: 

```javascript 

const key = {} 

const object = { 

[mutateAndReturnOtherValue(key)]: 42, 

}; 

mutate(key); 

``` 

We analyze and represent this correctly all the way through to codegen, but then 
we hit the bug that @mofeiZ has noticed before: the temporary for `t = 
mutateAndReturnOtherValue(key)` isn't emitted immediately (bc its a temporary). 
It gets emitted inside the memo block for `object`, which is incorrect. 

I tried to reproduce that here with JSX and it works as expected. It's an 
interesting case though so let's land this to ensure we don't regress.