aa-teardown: print out which profile removal failed

This is a follow-up of https://gitlab.com/apparmor/apparmor/-/merge_requests/1242
to make it easier to identify failures.

parser/rc.apparmor.functions

@@ -260,6 +260,7 @@ remove_profiles() {
 			rc=$?
 			if [ "$rc" -ne 0 ] ; then
 				retval=$rc
+				aa_log_failure_msg "Unloading profile '$profile' failed"
 			fi
 		done
 		return "$retval"