tools: fix multi-line string.
tools: fix multi-line string.

An error in the multi-line string results in apt-get install not running in
create-image.sh, this fixes that.

zoulasc/syzkaller,google/syzkaller,dotweiba/syzkaller,hyz0906/syzkaller,google/syzkaller,zoulasc/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,sploving/syzkaller,dotweiba/syzkaller,zoulasc/syzkaller,google/syzkaller,xairy/syzkaller,sploving/syzkaller,xairy/syzkaller,dotweiba/syzkaller,zoulasc/syzkaller,hyz0906/syzkaller,sploving/syzkaller,xairy/syzkaller,lorenzo-stoakes/syzkaller,xairy/syzkaller,xairy/syzkaller,lorenzo-stoakes/syzkaller,hyz0906/syzkaller,hyz0906/syzkaller,google/syzkaller,xairy/syzkaller,hyz0906/syzkaller,sploving/syzkaller,google/syzkaller,lorenzo-stoakes/syzkaller,dotweiba/syzkaller