Function indy_sys::ledger::indy_build_nym_request

#[no_mangle]
pub unsafe extern "C" fn indy_build_nym_request(
    command_handle: CommandHandle, 
    submitter_did: CString, 
    target_did: CString, 
    verkey: CString, 
    alias: CString, 
    role: CString, 
    cb: Option<ResponseStringCB>
) -> Error