add osmo-auc-gen_test

Add test for osmo-auc-gen invocations to ensure stability across upcoming SQN
increment scheme changes.

The test comprises of a shell script that invokes the osmo-auc-gen binary with
various milenage parameters, of which the stdout/stderr are verified.

More osmo-auc-gen invocations could be added, but my main focus is on the SEQ
changes. Instead of manually testing that it still works for each SQN patch, I
want this test to do it for me.

To make sure that osmo-auc-gen is build before the tests are launched, place
'utils' before 'tests' in the root Makefile.am.

Related: OS#1968
Change-Id: Ib4af34201cd2e7d76037bcd31dd89ef18c1a9aec
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 496ed65..352b5a7 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -192,7 +192,10 @@
 	     gsup/gsup_test.ok gsup/gsup_test.err			\
 	     oap/oap_test.ok fsm/fsm_test.ok fsm/fsm_test.err		\
 	     write_queue/wqueue_test.ok socket/socket_test.ok		\
-	     socket/socket_test.err coding/coding_test.ok
+	     socket/socket_test.err coding/coding_test.ok		\
+	     osmo-auc-gen/osmo-auc-gen_test.sh				\
+	     osmo-auc-gen/osmo-auc-gen_test.ok				\
+	     osmo-auc-gen/osmo-auc-gen_test.err
 
 DISTCLEANFILES = atconfig atlocal
 noinst_HEADERS = conv/conv.h