Rust wrapper: guard sha384 pbkdf2 unit test

Author: holtrop-wolfssl

wrapper/rust/wolfssl-wolfcrypt/tests/test_pbkdf2_password_hash.rs

@@ -82,6 +82,7 @@ fn test_default_params() {
 }
 
 #[test]
+#[cfg(sha384)]
 fn test_sha384_algorithm() {
     common::setup();