add sercomm unit test

Change-Id: I9e2e7fcda28e7c6844d5faa09e02acf537cea44d
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 4c8950c..63027d9 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -274,3 +274,9 @@
 cat $abs_srcdir/endian/endian_test.ok > expout
 AT_CHECK([$abs_top_builddir/tests/endian/endian_test], [0], [expout], [ignore])
 AT_CLEANUP
+
+AT_SETUP([sercomm])
+AT_KEYWORDS([sercomm])
+cat $abs_srcdir/sercomm/sercomm_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/sercomm/sercomm_test], [0], [expout], [ignore])
+AT_CLEANUP