message: Fix clippy warnings manual implementation of an assign operation
diff: @@ -592,7 +592,7 @@ pub extern "C" fn ___syscall145(
  if curr < 0 {
  return -1
  }
  - ret = ret + curr;
  + ret += curr;
  }
  // debug!(" => ret: {}", ret);
  ret
  @@ -628,7 +628,7 @@ pub extern "C" fn ___syscall146(
  if curr < 0 {
  return -1
  }
  - ret = ret + curr;
  + ret += curr;
  }
  // debug!(" => ret: {}", ret);
  ret
  