scan: --err-first-hit exits before showing matched output

[tstromberg]

Possibly related to #617 - but also possibly before that. /cc @egibs

 go run ./cmd/mal --err-first-hit scan /usr
🔎 Scanning "/usr"
👋 scan: "/usr/bin/busybox": matched requested condition

What I would have expected to before the exit is:

├─ 😈 /usr/bin/busybox
│     • anti-behavior/anti_debugger — multiple suspicious methods to detect a debugger:
│     /proc/%u/exe, /proc/self/exe, /sys/devices/system/cpu, LD_DEBUG, LD_PROFILE
│     • discover/network/interface_list — list network interfaces, avoids debugging:
│     LD_DEBUG, LD_PROFILE, gethostbyname, getifaddrs
│     • hw/dev/ubi — access raw unsorted block images (UBI): /dev/ubi%u

[egibs]

Good catch. Shouldn't be too hard to render before running cancel(). I'll look into this 👍🏻