Sync lang/php52 with ports:

* r318657:
	- CVE-2013-1635
	- CVE-2013-1643
* r324744:
	- Remove MAKE_JOBS_SAFE
* r325833:
	- CVE-2013-4113
	- exif_read_data fix
	- compilation warning
	- libxml2 >2.9 support
	- timezonedb 2013.4 (2013d)