[PATCH] benchmarks/rawio has a bug in commandline option parser

run rawio with -s option(size of raw disk device), as follows:

	    % rawio -a -s 30029328k -v 1 /dev/ad4c

returned:

	    Invalid length specification: -v

in source rawio.c, it skips parsing argument at one point.

PR: ports/58567
Submitted by: OOTOMO Hiroyuki <ootomo@za.wakwak.com>
Approved by: maintainer timeout