strongswan: bump to 5.4.0

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

net/strongswan/patches/210-sleep.patch

@@ -4,8 +4,8 @@
 			loop=110
 			while [ $loop -gt 0 ] ; do
 				kill -0 $spid 2>/dev/null || break
--				sleep 0.1
-+				sleep 1
-				loop=$(($loop - 1))
-			done
-			if [ $loop -eq 0 ]
+-				sleep 0.1 2>/dev/null
++				sleep 1 2>/dev/null
+				if [ $? -ne 0 ]
+				then
+					sleep 1