[react-native] Rewrite Haste imports in RN shims to use paths instead

This commit is a follow-up to facebook#15604, which explains more of the rationale behind moving React Native to path-based imports and the work needed in the React repository. In that linked PR, the generated renderers were updated but not the shims; this commit updates the shims.

Test Plan: Generated the renderers and shims with `yarn build` and then verified that the generated shims don't contain any Haste-style imports. Copied the renderers and shims into RN manually and launched the RNTester app to verify it loads end-to-end.

Author: ide

scripts/rollup/shims/react-native/NativeMethodsMixin.js

@@ -12,9 +12,9 @@
 
 const {
   __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED,
-} = require('ReactNative');
+} = require('./ReactNative');
 
-import type {NativeMethodsMixinType} from 'ReactNativeTypes';
+import type {NativeMethodsMixinType} from './ReactNativeTypes';
 
 const {NativeMethodsMixin} = __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
 

scripts/rollup/shims/react-native/ReactFabric.js

@@ -10,17 +10,17 @@
 
 'use strict';
 
-const BatchedBridge = require('BatchedBridge');
+import {BatchedBridge} from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
 
 // TODO @sema: Adjust types
-import type {ReactNativeType} from 'ReactNativeTypes';
+import type {ReactNativeType} from './ReactNativeTypes';
 
 let ReactFabric;
 
 if (__DEV__) {
-  ReactFabric = require('ReactFabric-dev');
+  ReactFabric = require('./ReactFabric-dev');
 } else {
-  ReactFabric = require('ReactFabric-prod');
+  ReactFabric = require('./ReactFabric-prod');
 }
 
 BatchedBridge.registerCallableModule('ReactFabric', ReactFabric);

scripts/rollup/shims/react-native/ReactNative.js

@@ -10,14 +10,14 @@
 
 'use strict';
 
-import type {ReactNativeType} from 'ReactNativeTypes';
+import type {ReactNativeType} from './ReactNativeTypes';
 
 let ReactNative;
 
 if (__DEV__) {
-  ReactNative = require('ReactNativeRenderer-dev');
+  ReactNative = require('./ReactNativeRenderer-dev');
 } else {
-  ReactNative = require('ReactNativeRenderer-prod');
+  ReactNative = require('./ReactNativeRenderer-prod');
 }
 
 module.exports = (ReactNative: ReactNativeType);

scripts/rollup/shims/react-native/createReactNativeComponentClass.js

@@ -10,9 +10,11 @@
 
 'use strict';
 
+import {ReactNativeViewConfigRegistry} from 'react-native/Libraries/ReactPrivate/ReactNativePrivateInterface';
+
 import type {ViewConfigGetter} from './ReactNativeTypes';
 
-const {register} = require('ReactNativeViewConfigRegistry');
+const {register} = ReactNativeViewConfigRegistry;
 
 /**
  * Creates a renderable ReactNative host component.