package/x11r7/xlib_libXfont: Bump version to 1.4.8

Fixes CVE-2014-0209, CVE-2014-0210 & CVE-2014-0211
http://lists.x.org/archives/xorg-announce/2014-May/002431.html



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