We have published the cordova 3.5.1 update for crosswalk 7&8 (stable & beta in XDK). You don't need to install anything, just rebuild your app and resubmit to google play. I just published a test app and haven't seen a new cordova alert so I think we are okay. Thanks for your patience.
Now I have a request for you. Many of you have been submitting both x86 and arm apk's to google play, but we need more. If you only submit the arm APK, it won't run on the 40 million tablets that Intel sold in 2014. It won't run on the new google nexus player (http://www.google.com/nexus/player/). Your users might get a black screen and give you a bad rating. My boss will come to my office and ask me why your game won't run on his phone.
Submitting both arm and x86 just takes a few minutes. It's a simple way to improve the user experience for you users, and much easier than the hard work you put into making a game.
The build email has a link to a zip file with arm and x86 apks. When you upload the APK in google play, there is a button in the top right that says 'switch to advanced mode' Click on it. Then upload the arm and x86 apk. Publish. That's it! If you have a problem, PM me.
It's the single most important way to show your appreciation for XDK and Crosswalk, so please do it, and help spread the word.