tests: Add tests for compile/run tcc.c with `tcc -b` then compile tcc.c again, then...

tests: Add tests for compile/run tcc.c with `tcc -b` then compile tcc.c again, then run tcctest.c

Just like with test[123] add their test[123]b variants. After previous 3
patchs all test pass here on Debian GNU/Linux on i385 with gcc-4.7 with
or without memory randomization turned on.