Fix build errors on GCC w/ libstdc++ 13.2.1 missing cstdint

Bug: webrtc:15870
Change-Id: Id91f6d603c777312eda6d3bc9f03c78109737372
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/343000
Reviewed-by: Jeremy Leconte <jleconte@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42150}
diff --git a/AUTHORS b/AUTHORS
index c0c4093..01ef5ab 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -129,6 +129,7 @@
 Uladzislau Susha <landby@gmail.com>
 Vicken Simonian <vsimon@gmail.com>
 Victor Costan <costan@gmail.com>
+Vinzenz Feenstra <evilissimo@gmail.com>
 Vladimir Beloborodov <VladimirTechMan@gmail.com>
 Xiaohong Xu <freemine@yeah.net>
 Xiaolei Yu <dreifachstein@gmail.com>
diff --git a/test/rtp_file_reader.h b/test/rtp_file_reader.h
index 4e26c71..4af704d 100644
--- a/test/rtp_file_reader.h
+++ b/test/rtp_file_reader.h
@@ -10,6 +10,7 @@
 #ifndef TEST_RTP_FILE_READER_H_
 #define TEST_RTP_FILE_READER_H_
 
+#include <cstdint>
 #include <set>
 #include <string>