tools/syz-execprog: mimic syz-fuzzer logic for executor failures
tools/syz-execprog: mimic syz-fuzzer logic for executor failures

syz-fuzzer fails only after 10-th executor error.
Do the same in syz-execprog, this is important for repro process.
Otherwise repro fails on transient failures.

google/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller