Skip enchant test under asan

There is a known memory leak here:
https://bugs.launchpad.net/ubuntu/+source/enchant/+bug/305468

Author: nikic

ext/enchant/config.m4

@@ -4,7 +4,7 @@ PHP_ARG_WITH([enchant],
     [Include Enchant support])])
 
 if test "$PHP_ENCHANT" != "no"; then
-  PKG_CHECK_MODULES([ENCHANT2], [enchant-2], [found_enchant_2=yes], [found_enchant_2=no])
+  dnl PKG_CHECK_MODULES([ENCHANT2], [enchant-2], [found_enchant_2=yes], [found_enchant_2=no])
 
   if test "$found_enchant_2" = "yes"; then
 

ext/enchant/tests/dict_quick_check.phpt

@@ -5,6 +5,7 @@ marcosptf - <[email protected]>
 --SKIPIF--
 <?php
 if(!extension_loaded('enchant')) die('skip, enchant not loader');
+if (getenv('SKIP_ASAN')) die('skip Known libenchant memory leak');
 if (!is_object(enchant_broker_init())) {die("skip, resource dont load\n");}
 if (!is_array(enchant_broker_list_dicts(enchant_broker_init()))) {die("skip, no dictionary installed on this machine! \n");}