Whitelist folders path from core

There are several folders bundled in the app that aren't needed in the
require cache list so it is simpler to opt-in the folders that should
be part of the cache.

build/tasks/generate-module-cache-task.coffee

@@ -11,3 +11,19 @@ module.exports = (grunt) ->
       ModuleCache.create(path.join(appDir, 'node_modules', packageName))
 
     ModuleCache.create(appDir)
+
+    metadata = grunt.file.readJSON(path.join(appDir, 'package.json'))
+
+    metadata._atomModuleCache.folders.forEach (folder) ->
+      if '' in folder.paths
+        folder.paths = [
+          ''
+          'exports'
+          'spec'
+          'src'
+          'src/browser'
+          'static'
+          'vendor'
+        ]
+
+    grunt.file.write(path.join(appDir, 'package.json'), JSON.stringify(metadata, null, 2))