[#202] object/eacl: Fix algorithm for checking eACL table

Add SignWithRFC6979 option to signature verification function since eACL
table are signed by users with this option.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/object/acl/eacl/opts.go

@@ -35,6 +35,7 @@ func (s *morphStorage) GetEACL(cid *container.ID) (*eacl.Table, error) {
 		func() ([]byte, []byte) {
 			return sig.Key(), sig.Sign()
 		},
+		signature.SignWithRFC6979(),
 	); err != nil {
 		return nil, errors.Wrap(err, "incorrect signature")
 	}