Uboot-env integration in Busybox

[ZigFisher]

[ZigFisher]

In order to save space, we can integrate utilities into busybox Some links from an interesting project:

https://github.com/opencomputeproject/onie/blob/master/patches/busybox/u-boot-env-tools.patch https://github.com/opencomputeproject/onie/blob/master/patches/busybox/fw_env-modify-crc-size-in-getenvsize.patch