It is current master (slated to become 5.7) that did bunch of zts changes
Merge pull request #687 from bjori/revert-pr-663

Bump version for zts, its master (PHP5.7) that introduced this change

* bjori/revert-pr-663:
  It is current master (slated to become 5.7) that did bunch of zts changes
Merge remote-tracking branch 'upstream/v1.5'

* upstream/v1.5:
  It is current master (slated to become 5.7) that did bunch of zts changes