Merge pull request +12026 from c9/b9

architect-build needs mkdirp

b9/lib/js/package.json

@@ -4,6 +4,7 @@
   "dependencies": {
     "async": "^1.5.2",
     "lodash": "^4.2.1",
+    "mkdirp": "^0.5.1",
     "optimist": "^0.6.1"
   }
 }