throwing for unresolved modules: flip logic

Summary:
The current test checks whether the target platform is `'ios'`. When building with windows, errors will also be swallowed silently.

This adds a check whether the target platform is `'android'`, where we have to avoid throwing for FB-internal reasons.

Reviewed By: martinbigio

Differential Revision: D3907025

fbshipit-source-id: 5abeb06b9121265fe1aa3932ad1785f148f04ddf

react-packager/src/Resolver/index.js

@@ -105,7 +105,7 @@ class Resolver {
       preferNativePlatform: true,
       fileWatcher: opts.fileWatcher,
       cache: opts.cache,
-      shouldThrowOnUnresolvedErrors: (_, platform) => platform === 'ios',
+      shouldThrowOnUnresolvedErrors: (_, platform) => platform !== 'android',
       transformCode: opts.transformCode,
       extraNodeModules: opts.extraNodeModules,
       assetDependencies: ['react-native/Libraries/Image/AssetRegistry'],