add language constants for maintenance

lang/serendipity_lang_ja.inc.php

@@ -1021,3 +1021,7 @@
 @define('AVAILABLE_TEMPLATES', 'Available Templates');
 @define('TIMESTAMP_RESET', 'The timestamp has been reset to the current time.');
 
+@define('CLEANCOMPILE_PASS', '[smarty clearCompiledTemplate(%s)]');
+@define('CLEANCOMPILE_FAIL', 'No files available for clearing.');
+@define('CLEANCOMPILE_TITLE', 'Clear template cache');
+@define('CLEANCOMPILE_INFO', 'This will purge all compiled template files of the currently active template. Compiled templates will be automatically re-created on demand by the Smarty framework.');