busybox updated to v1.31.0 + check if device is encrypted on kernel flash
- Updated busybox to v1.31.0 (compiled against "libselinux" and "libsepol")
- Gave "env.sh" execute permission
- Check if device is encrypted on kernel flashing
TODO: These are just for armhf/arm64, i386 and amd64 perhaps needs to be added?