Merge pull request #10418 from mpg/fix-udp-proxy

Fix includes in udp_proxy.c

programs/test/udp_proxy.c

@@ -17,11 +17,11 @@
 #include "mbedtls/build_info.h"
 
 #include <limits.h>
+#include <stdlib.h>
 #if defined(MBEDTLS_PLATFORM_C)
 #include "mbedtls/platform.h"
 #else
 #include <stdio.h>
-#include <stdlib.h>
 #if defined(MBEDTLS_HAVE_TIME)
 #include <time.h>
 #define mbedtls_time            time