osmo-sgsn: Depend on osmo-hlr

Since osmo-sgsn f4b2c4ca42cc530c38c9ac6f275e4d7da9315fa2, it depends on
libosmo-gsup-client available in osmo-hlr.

Change-Id: I44ce22d6c4b532b159fbdc7d5494830673db2509
diff --git a/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc b/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
index 45256a5..57ab845 100644
--- a/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
+++ b/recipes-osmocom/osmo-sgsn/osmo-sgsn.inc
@@ -3,7 +3,7 @@
 LICENSE = "AGPLv3"
 LIC_FILES_CHKSUM = "file://COPYING;md5=73f1eb20517c55bf9493b7dd6e480788"
 
-DEPENDS = "c-ares libosmocore libosmo-netif osmo-ggsn"
+DEPENDS = "c-ares libosmocore libosmo-netif osmo-ggsn osmo-hlr"
 
 INC_PR="r1.${META_TELEPHONY_OSMO_INC}"