prefetch-yarn-deps: fix resolving of local packages using file: (#387313)

Author: doronbehar

pkgs/build-support/node/fetch-yarn-deps/common.js

@@ -5,7 +5,9 @@ const path = require('path')
 const urlToName = url => {
 	const isCodeloadGitTarballUrl = url.startsWith('https://codeload.github.com/') && url.includes('/tar.gz/')
 
-	if (url.startsWith('git+') || isCodeloadGitTarballUrl) {
+	if (url.startsWith('file:')) {
+		return url
+	} else if (url.startsWith('git+') || isCodeloadGitTarballUrl) {
 		return path.basename(url)
 	} else {
 		return url