Fixing the problem with my_bool_t defined two times.

(it worked fine with the modern gcc, but failed on some other compilers).


modified:
  include/my_global.h
  include/mysql/plugin.h
  include/mysql/plugin_audit.h.pp
  include/mysql/plugin_auth.h.pp
  include/mysql/plugin_ftparser.h.pp
  include/mysql/service_thd_timezone.h
  sql/item_func.cc
  sql/mysqld.cc
  sql/set_var.cc
  sql/sql_plugin.cc
  sql/sql_plugin.h
  sql/sql_show.cc
  sql/sys_vars.cc
  storage/perfschema/ha_perfschema.cc

include/mysql/plugin.h

@@ -45,6 +45,8 @@ class Item;
 #define MYSQL_THD void*
 #endif
 
+typedef char my_bool;
+
 #include <mysql/services.h>
 
 #define MYSQL_XIDDATASIZE 128