fix des benches

Author: newpavlov

des/benches/des.rs

@@ -0,0 +1,9 @@
+#![feature(test)]
+extern crate test;
+
+use cipher::{block_decryptor_bench, block_encryptor_bench};
+
+block_encryptor_bench!(des::Des, des_encrypt_block, des_encrypt_blocks);
+block_decryptor_bench!(des::Des, des_decrypt_block, des_decrypt_blocks);
+block_encryptor_bench!(des::TdesEde3, tdes_ede3_encrypt_block, tdes_ede3_encrypt_blocks);
+block_decryptor_bench!(des::TdesEde3, tdes_ede3_decrypt_block, tdes_ede3_decrypt_blocks);