Include netinet/in.h in quic_ip_address.h

I just realized that neither of sys/ headers already included there actually defines in_addr and in6_addr.

gfe-relnote: n/a (no functional change)
PiperOrigin-RevId: 242941225
Change-Id: Ib03d8bc497bb22c806296dde7536c55c88a7bfac

quic/platform/api/quic_ip_address.h

diff --git a/quic/platform/api/quic_ip_address.h b/quic/platform/api/quic_ip_address.h
index 8f8db3a..f6013af 100644
--- a/quic/platform/api/quic_ip_address.h
+++ b/quic/platform/api/quic_ip_address.h
@@ -9,6 +9,7 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #else
+#include <netinet/in.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #endif