package/apache: security bump to version 2.4.16

Fixes CVE-2015-3183, CVE-2015-3185, CVE-2015-0253, CVE-2015-0228
http://marc.info/?l=apache-httpd-announce&m=143704705330655&w=2



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>