libsmack: New compatibility wrapper to 1.0.4

Adding a compatibility wrapper that declares the
legacy functions as 'deprecated' is improving
the slight transition to v1.1

Change-Id: I592e2881e33b2bb8be3f13d4072f66b5ed21eed0
Signed-off-by: José Bollo <jose.bollo@open.eurogiciel.org>
smackctl: Adding reliable usage

Adding help text providing usage information for smackctl utility.
Minor improvement of the manual page for smackctl.

Change-Id: I31f8fd4a4c866284255e4865bf7bb9512e3c793f
Signed-off-by: José Bollo <jose.bollo@open.eurogiciel.org>