task-sysmocom-feed: Add linux sctp library to the feed

libosmo-netif gained SCTP support and we should be able to provide
it.

Related: SYS#2524

recipes-apps/tasks/task-sysmocom-feed.bb

@@ -3,7 +3,7 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = " \
                     file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
 ALLOW_EMPTY_${PN} = "1"
-PR = "r20"
+PR = "r21"
 
 RDEPENDS_${PN} = "\
 	task-sysmocom-tools \
@@ -16,4 +16,4 @@ RDEPENDS_${PN} = "\
 	logrotate python-jsonrpclib python-enum iputils \
 	packagegroup-sysmobts-sob rtl8169-eeprom autossh \
 	perl libdbd-sqlite-perl libdbi-perl libjson-perl \
-	netcat-openbsd perf"
+	netcat-openbsd perf lksctp-tools"