tests: Run smscb/gsm0341_test during make check

Some initial testing for that module was writen to apparently do some
manual tests (rand()) but were never added to testsuite.at.
Let's make sure they run during make check (make the test deterministic
by removing rand()).

Change-Id: Icd4feced06afb749de994195c6b338df006749ad
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 44ae539..cc0b8c3 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -102,6 +102,12 @@
 AT_CHECK([$abs_top_builddir/tests/smscb/smscb_test], [0], [expout])
 AT_CLEANUP
 
+AT_SETUP([smscb_gsm0341])
+AT_KEYWORDS([smscb_gsm0341])
+cat $abs_srcdir/smscb/gsm0341_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/smscb/gsm0341_test], [0], [expout])
+AT_CLEANUP
+
 AT_SETUP([ussd])
 AT_KEYWORDS([ussd])
 cat $abs_srcdir/ussd/ussd_test.ok > expout