Fix sys_vars.large_files_support_basic failure.

mysql-test/suite/sys_vars/r/large_files_support_basic.result

 select @@global.large_files_support;
 @@global.large_files_support
-0
+1
 select @@session.large_files_support;
 ERROR HY000: Variable 'large_files_support' is a GLOBAL variable
 show global variables like 'large_files_support';
 Variable_name	Value
-large_files_support	OFF
+large_files_support	ON
 show session variables like 'large_files_support';
 Variable_name	Value
-large_files_support	OFF
+large_files_support	ON
 select * from information_schema.global_variables where variable_name='large_files_support';
 VARIABLE_NAME	VARIABLE_VALUE
-LARGE_FILES_SUPPORT	OFF
+LARGE_FILES_SUPPORT	ON
 select * from information_schema.session_variables where variable_name='large_files_support';
 VARIABLE_NAME	VARIABLE_VALUE
-LARGE_FILES_SUPPORT	OFF
+LARGE_FILES_SUPPORT	ON
 set global large_files_support=1;
 ERROR HY000: Variable 'large_files_support' is a read only variable
 set session large_files_support=1;