tests: Introduce running tests with GNU autotest in OpenBSC
The quality of the tests is of different value but it is good to
get started and improve from here.
diff --git a/openbsc/tests/gsm0408/gsm0408_test.ok b/openbsc/tests/gsm0408/gsm0408_test.ok
new file mode 100644
index 0000000..52c601e
--- /dev/null
+++ b/openbsc/tests/gsm0408/gsm0408_test.ok
@@ -0,0 +1,5 @@
+Testing test location area identifier
+Testing parsing and generating TMSI/IMSI
+hex: 17 08 99 78 56 34 12 90 78 36
+hex: 17 09 91 78 56 34 12 90 78 56 f4
+Done.