tests: Introduce a very basic gsm0808 test
This tests verifies the content of the GSM 08.08 messages, it does
not verify the remaining headroom (which the SCCP/IPA code relies
on being plenty to prepend the header). More to come in the future.
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 348355f..eff1ac4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,5 +1,5 @@
if ENABLE_TESTS
-SUBDIRS = timer sms ussd smscb bits a5 conv auth lapd
+SUBDIRS = timer sms ussd smscb bits a5 conv auth lapd gsm0808
if ENABLE_MSGFILE
SUBDIRS += msgfile
endif