libafs: Fix pioctl get/putInt alignment issues

libafs: Fix pioctl get/putInt alignment issues

We don't know if the buffer for pioctl data is aligned to anything, so
we can't just dereference the given pointer as an int or anything
else. So, just memcpy the data in for ints and such; conveniently,
afs_pd_getBytes and afs_pd_putBytes can do this for us, so just use
that.

Change-Id: Id1abdae55308db6fe1e13f541a5d776daa6af934
Reviewed-on: http://gerrit.openafs.org/2763
Tested-by: Andrew Deason <adeason@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>