syz-gce: increase log textarea size
syz-gce: increase log textarea size

There is nothing else on the syz-gce page,
so show more logs.

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