Fix path to include file in innodb_bug52745.test

mysql-test/suite/innodb/t/innodb_bug52745.test

--- source include/have_innodb_plugin.inc
+-- source include/have_innodb.inc
 
 let $file_format=`select @@innodb_file_format`;
 let $file_format_check=`select @@innodb_file_format_check`;