prog: fix union and struct offsets in SerializeForExec
prog: fix union and struct offsets in SerializeForExec

google/syzkaller,zoulasc/syzkaller,google/syzkaller,hyz0906/syzkaller,xairy/syzkaller,zoulasc/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,dotweiba/syzkaller,hyz0906/syzkaller,hyz0906/syzkaller,google/syzkaller,zoulasc/syzkaller,xairy/syzkaller,hyz0906/syzkaller,dotweiba/syzkaller,dotweiba/syzkaller,zoulasc/syzkaller,google/syzkaller,hyz0906/syzkaller,xairy/syzkaller,xairy/syzkaller,dotweiba/syzkaller