linux-user: Support F_ADD_SEALS and F_GET_SEALS fcntls

Also reorder blocks so that they are all in the same order everywhere.

Signed-off-by: Shu-Chun Weng <scw@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20201218193213.3566856-2-scw@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
3 files changed