Update beta version in versions.js

9.38.208.8 was released.
https://download.01.org/crosswalk/releases/crosswalk/android/beta/9.38.208.8/

This is non-trivial because 9.38.208.4 updates Cordova to 3.5.1, which has a security fix that Google Play complains about.
 Fixed Download canary link for arch-independent

 Fixed util.js version comparison bug:  "10" < "5" but 10 > 5
Merge branch 'pwnall-patch-1'