x86_machine_initfn allocates oem_id and oem_table_id via g_strndup,
but no instance_finalize existed for x86_machine_info, so these
strings were never freed when the object was destroyed.
Add x86_machine_finalize to release both fields.
Fixes: d07b22863b ("acpi: Move setters/getters of oem fields to X86MachineState")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
46d619d018