Changing files inside `node_modules` requires restarting packager

[satya164]

When I change files under node_modules, I need to restart the packager for it to pick up changes. The regression was introduced somewhere around v0.40. It becomes very difficult to debug/develop and debug libraries because of the issue.

[satya164]

cc @cpojer

[Crash--]

Since 0.39 we have some troubles with node_modules. See #11301

[lacker]

@cpojer claims this should work in a version of RN where jest-haste-map is updated to 19.x+

[satya164]

Seems it's in latest RC 570c564#diff-b9cfc7f2cdf78a7f4b91a753d10865a2

Maybe we could cherry-pick to stable? cc @grabbou

[grabbou]

I think it's a must as it's rather important feature. Let's discuss it tomorrow as I'll be wrapping up changelog.