contrib: shout: better fix the winstore build

The fix was missing from sock.c

contrib/src/shout/should-win32-ws2tcpip.patch

@@ -8,3 +8,13 @@
  #endif
  
  #ifndef NO_THREAD
+--- libshout.nok/src/common/net/sock.c.ws2tcpip	2019-03-06 13:20:11.624823900 +0100
++++ libshout.nok/src/common/net/sock.c	2019-03-07 07:21:23.841338100 +0100
+@@ -57,6 +57,7 @@
+ #include <netdb.h>
+ #else
+ #include <winsock2.h>
++#include <ws2tcpip.h>
+ #endif
+ 
+ #include "sock.h"