packaging: setup: handle ssh selinux context

Restore ~/.ssh selinux context if selinux is enabled
on the system.

Change-Id: I4ffe0a5f5509a74318b73ee2c4d72cb2bd9a6ddf
Bug-Url: https://bugzilla.redhat.com/1034786
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>