Fix bug #66509: copy() arginfo incorrect since 5.4

Since 5.4, the ZEND_BEGIN_ARG_INFO_EX was replaced
by non _EX, causing Reflection to assume the
$context parameter is required.
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  Fix bug #66509: copy() arginfo incorrect since 5.4

Conflicts:
	NEWS