change static to const

Author: Yiming Lin

aws-lc-rs/src/cmac.rs

@@ -137,31 +137,31 @@ impl Algorithm {
 }
 
 /// CMAC using AES-128.
-pub static AES_128: Algorithm = Algorithm {
+pub const AES_128: Algorithm = Algorithm {
     name: "AES_128",
     key_len: 16,
     tag_len: 16,
     cipher_fn: EVP_aes_128_cbc,
 };
 
 /// CMAC using AES-192.
-pub static AES_192: Algorithm = Algorithm {
+pub const AES_192: Algorithm = Algorithm {
     name: "AES_192",
     key_len: 24,
     tag_len: 16,
     cipher_fn: EVP_aes_192_cbc,
 };
 
 /// CMAC using AES-256.
-pub static AES_256: Algorithm = Algorithm {
+pub const AES_256: Algorithm = Algorithm {
     name: "AES_256",
     key_len: 32,
     tag_len: 16,
     cipher_fn: EVP_aes_256_cbc,
 };
 
 /// CMAC using 3DES (Triple DES). Obsolete
-pub static TDES_FOR_LEGACY_USE_ONLY: Algorithm = Algorithm {
+pub const TDES_FOR_LEGACY_USE_ONLY: Algorithm = Algorithm {
     name: "TDES",
     key_len: 24,
     tag_len: 8,