mm/kasan: add module decription

Modules without a description now cause a warning:

WARNING: modpost: missing MODULE_DESCRIPTION() in mm/kasan/kasan_test.o

[[email protected]: update description text, per Andrey]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 6c6c1fc ("modpost: require a MODULE_DESCRIPTION()")
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Andrey Konovalov <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Dmitriy Vyukov <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Jeff Johnson <[email protected]>
Cc: Macro Elver <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Nihar Chaithanya <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Sabyrzhan Tasbolatov <[email protected]>
Cc: Stehen Rothwell <[email protected]>
Cc: Vincenzo Frascino <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: arndb

mm/kasan/kasan_test_c.c

@@ -2127,4 +2127,5 @@ static struct kunit_suite kasan_kunit_test_suite = {
 
 kunit_test_suite(kasan_kunit_test_suite);
 
+MODULE_DESCRIPTION("KUnit tests for checking KASAN bug-detection capabilities");
 MODULE_LICENSE("GPL");