LibC: Add in6addr_{any,loopback} definitions

userspace/libraries/LibC/CMakeLists.txt

@@ -20,6 +20,7 @@ set(LIBC_SOURCES
 	malloc.cpp
 	math.cpp
 	netdb.cpp
+	netinet/in.cpp
 	poll.cpp
 	printf_impl.cpp
 	pthread.cpp

userspace/libraries/LibC/netinet/in.cpp

@@ -0,0 +1,4 @@
+#include <netinet/in.h>
+
+const struct in6_addr in6addr_any      = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+const struct in6_addr in6addr_loopback = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };