package/cracklib: add python3 support

python bindings supports python3 since version 2.8.19 and
https://github.com/cracklib/cracklib/commit/219de98766b9f1e4c8c5b174de770158ffda3a93

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/cracklib/cracklib.mk

@@ -19,9 +19,9 @@ else
 CRACKLIB_CONF_OPTS += --without-zlib
 endif
 
-ifeq ($(BR2_PACKAGE_PYTHON),y)
+ifeq ($(BR2_PACKAGE_PYTHON)$(BR2_PACKAGE_PYTHON3),y)
 CRACKLIB_CONF_OPTS += --with-python
-CRACKLIB_DEPENDENCIES += python
+CRACKLIB_DEPENDENCIES += $(if $(BR2_PACKAGE_PYTHON),python,python3)
 else
 CRACKLIB_CONF_OPTS += --without-python
 endif