Transfer module ownership to do_module_cleanup

Transfer module ownership to do_module_cleanup

This changes the do_module_cleanup structure to simply hold on to the
module itself.  This lets us remove most members from
do_module_cleanup.

gdb/ChangeLog
2020-09-23  Tom Tromey  <tom@tromey.com>

	* compile/compile-object-run.c (struct do_module_cleanup): Add
	parameters to constructor.  Update destructor.
	<source_file, scope, scope_data, out_value_type, out_value_addr,
	munmap_list_head, objfile_name_string>: Remove.
	<module>: New member.
	(do_module_cleanup): Update.
	(compile_object_run): Update.