Optional packaging of crosswalk only for Android < 4.4

Hi there,
http://blog.ionic.io/market-share-movement-android/ mentions that one should not package cross-walk for devices > 4.4 of Android. How does one go about optionally packaging cross-walk? I upload an x86 and an arm apk to the play store as part of my app - it includes crosswalk. How do I go about not including this based on OS version?

Anyone can help answer this?

Nylex I use my own build script, like this https://github.com/pliablepixels/zmNinja/blob/master/build_android.sh
I wrote a bash script instead of a node js script because I was more familiar with shell scripting. Ideally, this should be done as a portable script