Update verify_syscalls to check last write offset
Update verify_syscalls to check last write offset

Since it's important for reliable firmware updates to execute the write
that switches A/B partitions last, check this.

Also, clean up some code and add an option to get all of the violations
rather than just the first.

fhunleth/fwup,michaelkschmidt/fwup,fhunleth/fwup,michaelkschmidt/fwup,fhunleth/fwup,michaelkschmidt/fwup