Function indy_sys::anoncreds::indy_prover_set_credential_attr_tag_policy

#[no_mangle]
pub unsafe extern "C" fn indy_prover_set_credential_attr_tag_policy(
    command_handle: CommandHandle, 
    wallet_handle: WalletHandle, 
    cred_def_id: CString, 
    taggable_json: CString, 
    retroactive: bool, 
    cb: Option<ResponseEmptyCB>
) -> Error