This cset just re-uses the approach from facebook/mysql-5.6 (Perhaps we
will have something different for MariaDB in the end).

For now this is:
Port this fix
  dd7eeae69503cb8ab6ddc8fd9e2fef451cc31a32
  Issue#250: MyRocks/Innodb different output from query with order by on table with index and decimal type
  Summary:
  Make open_binary_frm() set TABLE_SHARE::primary_key before it computes

Also add the patch for
  https://github.com/facebook/mysql-5.6/issues/376