iotools: import from upstream Gentoo

This is a cleaned up version of what is in our tree.

BUG=None
TEST=`emerge-stumpy iotools` works
TEST=`rdmsr 0 0x3a` works
TEST=`emerge-x86-alex iotools` works

Change-Id: Idedd6d4d4ec2564cb11c843649db0a1c8d44d305
Reviewed-on: https://gerrit.chromium.org/gerrit/42998
Reviewed-by: Kees Cook <keescook@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
4 files changed