selftests: add soft-dirty into run_vmtests.sh

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Peter Xu <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Cc: Andrea Arcangeli <[e-mail]>
Cc: Nadav Amit <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

tools/testing/selftests/vm/run_vmtests.sh

···
 	run_test ./protection_keys_64
 fi
 
+run_test ./soft-dirty
+
 exit $exitcode