chsmack: add option to remove labels
chsmack: add option to remove labels

Adding that option allow chsmack to remove the smack labels.
It is really important to have it.

Signed-off-by: José Bollo <08496fd66cc394b517cafa0b18bcb9ce79fe4230@open.eurogiciel.org>

jobol/smack,smack-team/smack,smack-team/smack,jobol/smack