debian/control: Add dependency to libsctp-dev

[  337s] main.c:33:10: fatal error: netinet/sctp.h: No such file or directory
[  337s]  #include <netinet/sctp.h>
[  337s]           ^~~~~~~~~~~~~~~~

Change-Id: Iaec1c688ac136bd146dbc9527804c238245cac47
diff --git a/debian/control b/debian/control
index b801091..3efd4c2 100644
--- a/debian/control
+++ b/debian/control
@@ -14,6 +14,7 @@
                libnl-route-3-dev,
                libosmocore-dev (>= 1.1.0),
                libosmo-netif-dev,
+               libsctp-dev,
                osmo-gsm-manuals-dev
 Standards-Version: 3.9.8
 Vcs-Git: git://git.osmocom.org/osmo-uecups.git