Dev mode: fixed loading plugins located outside of the Flipper source root folder

Summary: Dev mode: fixed loading of plugins located outside of the Flipper source root folder, e.g. in ~/flipper-plugins as suggested in tutorial docs.

Reviewed By: passy

Differential Revision: D21306639

fbshipit-source-id: bb9044b25324065f0c12169b95fbe663da8d4305

desktop/babel-transformer/src/transform-app.ts

@@ -35,5 +35,6 @@ function transform({
   }
   plugins.push(require('./electron-requires'));
   plugins.push(require('./import-react'));
+  plugins.push(require('./app-flipper-requires'));
   return doTransform({filename, options, src, presets, plugins});
 }