mgcp/test: Add test cases for transcoding and repacking

This patch adds test cases for transcoding and repacking.

Sponsored-by: On-Waves ehf
diff --git a/openbsc/tests/atlocal.in b/openbsc/tests/atlocal.in
index 4635113..542a78e 100644
--- a/openbsc/tests/atlocal.in
+++ b/openbsc/tests/atlocal.in
@@ -1,3 +1,4 @@
 enable_nat_test='@osmo_ac_build_nat@'
 enable_smpp_test='@osmo_ac_build_smpp@'
 enable_bsc_test='@osmo_ac_build_bsc@'
+enable_mgcp_transcoding_test='@osmo_ac_mgcp_transcoding@'