lib/core: Show the exitcode in kmsg as well

This provides symmetry with logging the start of the test via kmsg.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

lib/igt_core.c

@@ -943,6 +943,8 @@ void igt_exit(void)
 	if (igt_only_list_subtests())
 		exit(IGT_EXIT_SUCCESS);
 
+	kmsg(KMSG_INFO "%s: exiting, ret=%d\n", command_str, igt_exitcode);
+
 	if (!test_with_subtests)
 		exit(igt_exitcode);