[Crash-utility] mod cmd fixes for -g -r

6.0.3 added -g and -r options to the mod command, but they can't be used together. This patch allows "-r -g" or "-rg" or "-Srg" etc. crash-6.0.3> mod -r -g -S /usr/lib/debug/lib/modules/3.1.4-clim-3-amd64 mod: invalid option -- 'g' Usage: mod -s module [objfile] | -d module | -S [directory] | -D | -r | -R | -o | -g Enter "help mod" for details. Still working on the flaky module symbol problem... Bob Montgomery