kmsan: test: add module description

Every module should have a description, and kbuild now warns for those
that don't.

WARNING: modpost: missing MODULE_DESCRIPTION() in mm/kmsan/kmsan_test.o

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Alexander Potapenko <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Dmitriy Vyukov <[email protected]>
Cc: Macro Elver <[email protected]>
Cc: Sabyrzhan Tasbolatov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: arndb

mm/kmsan/kmsan_test.c

@@ -732,3 +732,4 @@ kunit_test_suites(&kmsan_test_suite);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Alexander Potapenko <[email protected]>");
+MODULE_DESCRIPTION("Test cases for KMSAN");