lksctp-tools: make -utils and -ptest recommend sctp kernel module

Neither -utils nor -ptest packages make sense w/o actual kernel support
for SCTP protocol. Make both packages RRECOMMEND kernel-module-sctp.

Signed-off-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>