LibCore: Add definitions for socketpair in SocketAddressWindows.h

Author: https://github.com/stasoid
Commit: https://github.com/LadybirdBrowser/ladybird/commit/e0576f47907
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2673
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/konradekk

Libraries/LibCore/SocketAddressWindows.h

@@ -29,6 +29,11 @@ typedef USHORT ADDRESS_FAMILY;
 #define AF_INET 2
 #define AF_INET6 23
 
+#define SOCK_STREAM 1
+#define SOCK_DGRAM 2
+
+#define INADDR_LOOPBACK 0x7f000001
+
 enum IPPROTO {
     IPPROTO_TCP = 6
 };