avformat/tests/fifo_muxer: includes libavformat/network.h to define ETIMEDOUT for fate build.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/tests/fifo_muxer.c

@@ -25,6 +25,7 @@
 #include "libavutil/avassert.h"
 #include "libavformat/avformat.h"
 #include "libavformat/url.h"
+#include "libavformat/network.h"
 
 #define MAX_TST_PACKETS 128
 #define SLEEPTIME_50_MS 50000