Fix DLL for Windows (#4959)

* Implement autodllplugin

* Add flow-typed for autodll-webpack-plugin

* Improve onClick tests

* Make third test pass

* Make sure DLL bundle is loaded without async

* Add nonce

* Fix windows DLL path

build/webpack/plugins/build-manifest-plugin.js

@@ -14,8 +14,9 @@ export default class BuildManifestPlugin {
       const mainJsFiles = mainJsChunk && mainJsChunk.files.length > 0 ? mainJsChunk.files.filter((file) => /\.js$/.test(file)) : []
 
       for (const filePath of Object.keys(compilation.assets)) {
-        if (/^static\/dll\//.test(filePath)) {
-          assetMap.devFiles.push(filePath)
+        const path = filePath.replace(/\\/g, '/')
+        if (/^static\/dll\//.test(path)) {
+          assetMap.devFiles.push(path)
         }
       }