Backport WL#4098 from 6.0.

The value was changed from 1024 to 2048,
because 1024 is already used.

Original revision:
------------------------------------------------------------
revno: 2476.657.259
committer: tsmith@bk-internal.mysql.com
timestamp: Tue 2008-01-29 19:32:44 +0100
message:
  WL#4098: Add a status flag for slow queries
  
  Add new result set status flag SERVER_QUERY_WAS_SLOW in mysql_com.h.
  
  There is no server-side implementation to actually set this flag at this
  time.  This patch simply defines the interface so that applications can
  make use of it.  See the worklog for background.
------------------------------------------------------------

include/mysql_com.h

@@ -203,6 +203,7 @@ enum enum_server_command
   number of result set columns.
 */
 #define SERVER_STATUS_METADATA_CHANGED 1024
+#define SERVER_QUERY_WAS_SLOW          2048
 
 /**
   Server status flags that must be cleared when starting