kunit/usercopy: Add missing MODULE_DESCRIPTION()

Fix warning seen with:

$ make allmodconfig && make W=1 C=1 lib/usercopy_kunit.ko
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/usercopy_kunit.o

Signed-off-by: Jeff Johnson <[e-mail]>
Signed-off-by: Kees Cook <[e-mail]>
Reviewed-by: Rae Moar <[e-mail]>
Reviewed-by: David Gow <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

lib/usercopy_kunit.c

···
 
 kunit_test_suites(&usercopy_test_suite);
 MODULE_AUTHOR("Kees Cook <[e-mail]>");
+MODULE_DESCRIPTION("Kernel module for testing copy_to/from_user infrastructure");
 MODULE_LICENSE("GPL");