Skip gh_77 test for older libmemcached

Author: mkoppanen

tests/gh_77.phpt

@@ -2,7 +2,7 @@
 Test for Github issue #77
 --SKIPIF--
 <?php if (!extension_loaded("memcached")) print "skip";
-      if (!in_array ('touch', get_class_methods ('memcached'))) die ('skip too old libmemcached');
+      if (Memcached::LIBMEMCACHED_VERSION_HEX < 0x01000016) die ('skip too old libmemcached');
 ?>
 --FILE--
 <?php