Add SMS (GSM 04.11) testing program
diff --git a/tests/Makefile.am b/tests/Makefile.am
index f964be1..ccfedce 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1 +1 @@
-SUBDIRS = debug timer
+SUBDIRS = debug timer sms