Plugins now when compiled or not compiled work correctly with status variables. 
Status variables from plugins now set their own names (removed bit where plugin name was pre-appended this broke Innodb and Cluster)
A few Makefile cleanups. 


sql/ha_innodb.cc:
  Cleanup to make status variables directly in engine
sql/ha_ndbcluster.cc:
  Engine interface now has variables for status
sql/handler.cc:
  handler now makes sure to init status variables
sql/mysqld.cc:
  Removed status variable hacks
sql/sql_delete.cc:
  Removed include file that was not required
storage/myisam/Makefile.am:
  Cleaned up line lengths and addded additional include to not install.
storage/myisam/ha_myisam.cc:
  Removed double plugin include