Make moans about unknown ioctls more informative (#336772)

This is a slightly modified version of a patch from Ivo Raisr <ivosh@ivosh.net>.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14116 a5019735-40e9-0310-863c-91ae7b9d1cf9
6 files changed