Add rtp_test to show the double-bind bug of OS#4444

Change-Id: I6742e5504cfb827031031e4d8d49a616ab203a94
diff --git a/tests/testsuite.at b/tests/testsuite.at
index ff550b0..5e87248 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -23,3 +23,9 @@
 AT_CHECK([$abs_top_builddir/tests/subchan_demux/subchan_demux_test], [], [expout])
 AT_CLEANUP
 
+AT_SETUP([rtp_test])
+AT_KEYWORDS([rtp_test])
+cat $abs_srcdir/rtp_test/rtp_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/rtp_test/rtp_test], [ignore], [expout])
+AT_CLEANUP
+