David Aurelio 5710b230a2 Support false mappings in "browser" fields
Summary:
This adds support for `false` values in `package.json` `"browser"` and `"react-native"` mappings.
All `false` values are not longer silently ignored, but redirected to an empty file.

Fixes #9854 #9518

Reviewed By: bestander

Differential Revision: D3876521

fbshipit-source-id: 96d1ba03518812bc88c51672c374956eabd40c9b
2016-09-16 06:13:35 -07:00
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2016-07-29 11:15:02 -07:00