Merge branch 'PHP-7.0'

Merge branch 'PHP-7.0'

* PHP-7.0:
  Added zend_internal_function.reserved[] fields, to allow extensions keep additional associated information. We didn't have zend_internal_function.reserved[] in PHP5, but we always allocated space for zend_function union, and extensions were able to reuse zend_function.op_array.reserved[] even for internal function. Now this is not possible. And extensions have to use zend_function.op_array.reserved[] for user functions and zend_function.internal_function.reserved[] for internal.