all.deps, werror.opts: add osmo-bsc-nat

Change-Id: Ica90826c8bfbf4f295c49702d36e7c88e43f80cd
diff --git a/all.deps b/all.deps
index 65bdf27..54209eb 100644
--- a/all.deps
+++ b/all.deps
@@ -23,6 +23,7 @@
 asn1c	libasn1c
 osmo-gbproxy	libosmocore
 osmo-pcap	libosmocore
+osmo-bsc-nat	libosmo-sccp
 
 # can only clone these
 docker-playground