dillon1000/react

[patch] Fix for constant propagation bug in VR Store

--- 

Changes in `@enableOptimizeFunctionExpressions` caused a bug in the last Forget 
sync to VR Store. The repro can be summarized to something like this: 

```js 

function foo() { 

const x = true; // some constant or global 

// Add some branching for type inference 

// This can be a Logical expression as well (e.g. `4 || 5`) 

if (...) { } 

// In this HIR block, SSA inserts a `x$2 = phi(x$1, x$1)`. 

// EliminateRedundantPhiNodes needs to rewrite all references of `x$2` to `x$1` 

const accessXInLambda = () => x; 

return accessXInLambda; 

}