Cherry-pick one part of innodb-5.1-ss2438 snapshot.

Bug #36278 Data_free in SHOW TABLE STATUS for InnoDB is in kilobytes

Change the fix for Bug 32440 to show bytes instead of kilobytes in
INFORMATION_SCHEMA.TABLES.DATA_FREE.

storage/innobase/handler/ha_innodb.cc

@@ -5792,7 +5792,7 @@ ha_innobase::info(
 					* UNIV_PAGE_SIZE;
 		stats.delete_length =
 			fsp_get_available_space_in_free_extents(
-				ib_table->space);
+				ib_table->space) * 1024;
 		stats.check_time = 0;
 
 		if (stats.records == 0) {