Summary:
So far, Flipper has concatenated paths assuming is only ever built on unix-like systems.
For RNW, this approach fails.
This change is a very simple way of achieving WIN32 support without using any extra libraries or routines for path building.
Reviewed By: antonk52
Differential Revision: D39053479
fbshipit-source-id: e8b4b71cc1d17ca6aba88d40cad7d96a30ad1267
c2440b6660