[project][zybo-test] add libm to the build
[project][zybo-test] add libm to the build

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