Build lldp-systemd-networkd-sysrepod

Change-Id: I2c1efc2729d4a84fad4d38dd7048801e39423cde
Depends-on: https://cesnet-gerrit-czechlight/c/CzechLight/lldp-systemd-networkd-sysrepo/+/3117
Depends-on: https://cesnet-gerrit-public/c/CzechLight/lldp-systemd-networkd-sysrepo/+/3117
Depends-on: https://gerrit.cesnet.cz/c/CzechLight/lldp-systemd-networkd-sysrepo/+/3117
diff --git a/.gitmodules b/.gitmodules
index b249b40..669c57f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,3 +13,6 @@
 [submodule "submodules/velia"]
 	path = submodules/velia
 	url = ../velia/
+[submodule "submodules/lldp-systemd-networkd-sysrepo"]
+	path = submodules/lldp-systemd-networkd-sysrepo
+	url = ../lldp-systemd-networkd-sysrepo