Update btr0btr.cc

<Comment> About TPC-C benchmark

Author: LeeBohyun

mysql-5.6.26/storage/innobase/btr/btr0btr.cc

@@ -3695,6 +3695,7 @@ btr_page_split_and_insert(
 
 	// current evaluation is based on TPC-C benchmark
 	ibool tpcc_table = FALSE;
+	// below code is optimizing redistribute to TPC-C benchmark
 
 	if(buf_block_get_space(btr_cur_get_block(cursor)) ==srv_ol_space_id
 	|| buf_block_get_space(btr_cur_get_block(cursor)) ==srv_his_space_id