basic C80 features working.
NULL or empty args. start-sanitize-tic80 * Makefile.in (tic80-tdep.o): Add target. * configure.tgt: Add tic80 case. * tic80-tdep.c: New file. * config/tic80/{tic80.mt, tm-tic80.h}: New files. end-sanitize-tic80