libosmo-netif: Add explicit dependency lksctp-tools

Since libosmo-netif.git d1b1ff77a6bc2f70366c5d2f5079c70f5eae52a0, use of
libsctp is enabled by default and explicitly required.

Change-Id: Ib53557f21cad86300738f43b247df1e17166c46f
1 file changed