vlib: use new filename format

vlib/net/init_nix.c.v

@@ -0,0 +1,17 @@
+module net
+
+#include <sys/socket.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <errno.h>
+fn error_code() int {
+	return C.errno
+}
+
+pub const (
+	MSG_NOSIGNAL = 0x4000
+)
+
+#flag solaris -lsocket
+