invalid resource directory name: /Applications/AndroidSDK/ [...] /google-play-services_lib/bin/res/crunch

I just updated to the latest Cordova by doing the following:

npm update -g cordova

cordova platform update android 

Which took my Cordova CLI to v4 and my Cordova for Android to 3.6.4.

 I then had a problem building:

     [aapt] invalid resource directory name: /Applications/AndroidSDK/sdk/extras/google/google_play_services/libproject/google-play-services_lib/bin/res/crunch

 The fix turned out to be simple; I deleted the crunch directory and then all was good.