[project][zybo-test] add lib/cksum
[project][zybo-test] add lib/cksum

ErikCorryGoogle/lk,GCrean/lk,M1cha/lk,littlekernel/lk,GCrean/lk,srodrig1/lk,nvll/lk,sndnvaps/lk,ErikCorryGoogle/lk,grub4android/lk,skabet/lk,littlekernel/lk,M1cha/lk,travisg/lk,minglun-tsai/lk,skabet/lk,skabet/lk,srodrig1/lk,littlekernel/lk,travisg/lk,skabet/lk,skabet/lk,hollanderic/lkstuff,nvll/lk,sndnvaps/lk,srodrig1/lk,GCrean/lk,ErikCorryGoogle/lk,nvll/lk,littlekernel/lk,hollanderic/lkstuff,sndnvaps/lk,nvll/lk,minglun-tsai/lk,hollanderic/lkstuff,M1cha/lk,travisg/lk,minglun-tsai/lk,nvll/lk,grub4android/lk,grub4android/lk,GCrean/lk,srodrig1/lk,grub4android/lk,sndnvaps/lk,travisg/lk,minglun-tsai/lk,hollanderic/lkstuff,M1cha/lk,M1cha/lk,srodrig1/lk,ErikCorryGoogle/lk,sndnvaps/lk,grub4android/lk,GCrean/lk