IWYU: uint32_t is defined in cstdint

This is required for gcc-10.

Bug: None
Change-Id: I0d04f720d09b42e1d54e058b897ddc047ef64bf6
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/174204
Reviewed-by: Magnus Flodman <mflodman@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31184}
diff --git a/AUTHORS b/AUTHORS
index ae9d4e2..97db345 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -89,6 +89,7 @@
 CZ Theng <cz.theng@gmail.com>
 Miguel Paris <mparisdiaz@gmail.com>
 Raman Budny <budnyjj@gmail.com>
+Stephan Hartmann <stha09@googlemail.com>
 
 &yet LLC <*@andyet.com>
 Agora IO <*@agora.io>
diff --git a/call/rtx_receive_stream.h b/call/rtx_receive_stream.h
index 8ffa440..a389fc2 100644
--- a/call/rtx_receive_stream.h
+++ b/call/rtx_receive_stream.h
@@ -11,6 +11,7 @@
 #ifndef CALL_RTX_RECEIVE_STREAM_H_
 #define CALL_RTX_RECEIVE_STREAM_H_
 
+#include <cstdint>
 #include <map>
 
 #include "call/rtp_packet_sink_interface.h"