Summary:
[flipper] Don't break the build if the reactdevtools patching fails
There seems to be a bug in yarn workspaces on Windows:
```
Error: Cannot find module 'D:\\a\\flipper\\flipper\\desktop\\plugins\\public\\node_modules\\node_modules\\ts-node\\dist\\bin.js
```
Pull Request resolved: https://github.com/facebook/flipper/pull/5070
Test Plan: Let's see if CI will be happy again.
Reviewed By: lblasa
Differential Revision: D48681388
Pulled By: passy
fbshipit-source-id: d41f21be09c9d060e3c68e36466cfc54b3272325
3337c28893