Disable query_cache_28249 due to Bug#43861.

mysql-test/t/disabled.def

@@ -11,5 +11,7 @@
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 kill                     : Bug#37780 2008-12-03 HHunger need some changes to be robust enough for pushbuild.
 innodb_bug39438          : BUG#42383 2009-01-28 lsoares "This fails in embedded and on windows.  Note that this test is not run on windows and on embedded in PB for main trees currently"
+query_cache_28249        : Bug#43861 2009-03-25 main.query_cache_28249 fails sporadically
+
 #concurrent_innodb_safelog: disabled for embedded server due to bug#43733 Select on processlist let the embedded server crash (concurrent_innodb_safelog).
 #concurrent_innodb_unsafelog: disabled for embedded server due to bug#43733.