Drop redundant \n in pr_perror

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
test: Add some idiotic script for testing

Doesn't work yet, need to improve. Pushed out
just to have a backup of it.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>