PR jit/63854: Fix leaks in toyvm.c

PR jit/63854: Fix leaks in toyvm.c

gcc/jit/ChangeLog:
	PR jit/63854
	* docs/examples/tut04-toyvm/toyvm.c
	(toyvm_compiled_function): New typedef.
	(toyvm_compiled_func) Rename to...
	(toyvm_compiled_code) ...this.
	(struct toyvm_compiled_function): New struct.
	(toyvm_function_compile): Return a toyvm_compiled_function *
	rather than a toyvm_compiled_func, so that the caller can fully
	clean things up.  Free "funcname".
	(test_script): Update for change to toyvm_function_compile.
	Clean up the toyvm_compiled_function.
	(main): Likewise.
	(docs/intro/tutorial04.rst): Update to reflect the above changes,
	and to better spell out the lifetime of the compiled code.

From-SVN: r218234