Move SABP_Selftest.ttcn under library/sabp

Same as we already have for RANAP.

Change-Id: If04d973a393153a7cd15429d036f60adeea4b5f9
diff --git a/cbc/SABP_Selftest.ttcn b/library/sabp/SABP_Selftest.ttcn
similarity index 100%
rename from cbc/SABP_Selftest.ttcn
rename to library/sabp/SABP_Selftest.ttcn