Make gethostbyname() test more liberal

This returns 127.0.1.1 on travis bionic.

Author: nikic

ext/standard/tests/network/gethostbyname_basic003.phpt

@@ -6,6 +6,6 @@ echo "*** Testing gethostbyname() : basic functionality ***\n";
 
 echo gethostbyname("localhost")."\n";
 ?>
---EXPECT--
+--EXPECTF--
 *** Testing gethostbyname() : basic functionality ***
-127.0.0.1
+127.0.%d.1