Portability fixes


include/my_tree.h:
  Add missing include file.
mysql-test/r/select.result:
  Update results for new SHOW FULL COLUMNS
mysql-test/r/type_blob.result:
  Update results for new SHOW FULL COLUMNS
mysql-test/r/type_float.result:
  Update results for new SHOW FULL COLUMNS
mysql-test/r/type_ranges.result:
  Update results for new SHOW FULL COLUMNS
mysql-test/t/heap_btree.test:
  Update results for new SHOW FULL COLUMNS