nat: Add the OSMO NAT to the build process.
diff --git a/openbsc/tests/Makefile.am b/openbsc/tests/Makefile.am
index 3b1b931..b469832 100644
--- a/openbsc/tests/Makefile.am
+++ b/openbsc/tests/Makefile.am
@@ -1 +1 @@
-SUBDIRS = debug gsm0408 db channel sccp
+SUBDIRS = debug gsm0408 db channel sccp bsc-nat