fix: add misc

fix porting

Change-Id: Iec5ed30d8f02095312ced41ac5ae869e8f9521a4

porting/liteos_a/user/src/network/gethostbyname2.c

-#define _GNU_SOURCE
-
-#include <sys/socket.h>
-#include <netdb.h>
-#include <errno.h>
-#include <stdlib.h>
-
-struct hostent *gethostbyname2(const char *name, int af)
-{
-	static struct hostent *h;
-	size_t size = 63;
-	struct hostent *res;
-	int err;
-
-	do {
-		free(h);
-		h = malloc(size+=size+1);
-		if (!h) {
-			h_errno = NO_RECOVERY;
-			return 0;
-		}
-		err = gethostbyname2_r(name, af, h,
-			(void *)(h+1), size-sizeof *h, &res, &h_errno);
-	} while (err == ERANGE);
-	return err ? 0 : h;
-}