Strip hash from chunk file name (facebook#3049)

Author: esturcke

packages/react-dev-utils/FileSizeReporter.js

@@ -92,7 +92,10 @@ function printFileSizesAfterBuild(
 function removeFileNameHash(buildFolder, fileName) {
   return fileName
     .replace(buildFolder, '')
-    .replace(/\/?(.*)(\.\w+)(\.js|\.css)/, (match, p1, p2, p3) => p1 + p3);
+    .replace(
+      /\/?(.*)(\.[0-9a-f]+)(\.chunk)?(\.js|\.css)/,
+      (match, p1, p2, p3, p4) => p1 + p4
+    );
 }
 
 // Input: 1024, 2048