kcsan: Add missing MODULE_DESCRIPTION() macro

Fix the warning reported by 'make C=1 W=1':
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/kcsan/kcsan_test.o

Signed-off-by: Jeff Johnson <[email protected]>
Reviewed-by: Marco Elver <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>

Author: Jeff Johnson

kernel/kcsan/kcsan_test.c

@@ -1620,5 +1620,6 @@ static struct kunit_suite kcsan_test_suite = {
 
 kunit_test_suites(&kcsan_test_suite);
 
+MODULE_DESCRIPTION("KCSAN test suite");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Marco Elver <[email protected]>");