test: add csd_test

Show that csd_bs_list_remove() is currently broken, the next patch will
fix it.

Related: OS#4394
Change-Id: Icc98de75e97c75216a71caf94355d09330c95cba
diff --git a/configure.ac b/configure.ac
index 44b0881..61df7de 100644
--- a/configure.ac
+++ b/configure.ac
@@ -249,6 +249,7 @@
     tests/msc_vlr/Makefile
     tests/sdp_msg/Makefile
     tests/mncc/Makefile
+    tests/csd/Makefile
     doc/Makefile
     doc/examples/Makefile
     doc/manuals/Makefile