iface/gspn/dcswaveltl.test, iface/gspn/dcswaveeltl.test, iface/gspn/dcswavefm.test: Do not accept $? = 0 when a failure is expected.
* iface/gspn/Makefile.am (check_PROGRAMS): Add fmgspn-rg and fmgspn-srg. (fmgspn_rg_SOURCES, fmgspn_rg_CPPFLAGS, fmgspn_rg_LDADD, fmgspn_srg_SOURCES, fmgspn_srg_CPPFLAGS, fmgspn_srg_LDADD): New variables. (TESTS): Add dcswavefm.test.