[travis-ci] add a few more release mode builds
[travis-ci] add a few more release mode builds

hollanderic/lkstuff,hollanderic/lkstuff,travisg/lk,travisg/lk,littlekernel/lk,littlekernel/lk,travisg/lk,hollanderic/lkstuff,littlekernel/lk,littlekernel/lk,travisg/lk,hollanderic/lkstuff