fix build

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/server/audio_service.rs

@@ -15,6 +15,8 @@
 use super::*;
 use magnum_opus::{Application::*, Channels::*, Encoder};
 use std::sync::atomic::{AtomicBool, Ordering};
+#[cfg(not(any(target_os = "linux", target_os = "android")))]
+use hbb_common::anyhow::anyhow;
 
 pub const NAME: &'static str = "audio";
 pub const AUDIO_DATA_SIZE_U8: usize = 960 * 4; // 10ms in 48000 stereo