Fixing headers for Windows 2000.

BUG=v8:1724

Review URL: http://codereview.chromium.org/8068002
Patch from Vovan Shutoff <vovan@shutoff.ru>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9471 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/win32-headers.h

@@ -75,6 +75,7 @@
 // makes it impossible to have them elsewhere.
 #include <winsock2.h>
 #include <ws2tcpip.h>
+#include <wspiapi.h>
 #include <process.h>  // for _beginthreadex()
 #include <stdlib.h>
 #endif  // V8_WIN32_HEADERS_FULL