sysctl: Add module description to sysctl-testing

Added a module description to sysctl Kunit self test module to fix the
'make W=1' warning (" WARNING: modpost: missing MODULE_DESCRIPTION() in
kernel/sysctl-test.o")
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Joel Granados <j.granados@samsung.com>

kernel/sysctl-test.c

@@ -437,4 +437,5 @@ static struct kunit_suite sysctl_test_suite = {
 
 kunit_test_suites(&sysctl_test_suite);
 
+MODULE_DESCRIPTION("KUnit test of proc sysctl");
 MODULE_LICENSE("GPL v2");