php: update to 5.6.18 and 6.6.32

Moved LIC_FILES_CHKSUM from .inc to .bb

5.6.18 changed do to yr update.

Includes: CVE-2016-2554

and

PCRE:
    Upgraded bundled PCRE library to 8.38. (CVE-2015-8383, CVE-2015-8386, CVE-2015-8387, CVE-2015-8389, CVE-2015-8390, CVE-2015-8391, CVE-2015-8393, CVE-2015-8394)

see http://php.net/ChangeLog-5.php#5.6.18 for more info.
http://php.net/ChangeLog-5.php#5.5.32



Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>