[A-2907] New on ARMedslack-current

ap/screen-4.0.3-arm-2.tgz: Rebuilt.
Use a larger buffer for the termtype variable to fix crashes with long names (e.g. rxvt-unicode-256color).
Thanks to cteg.
l/libpng-1.4.8-arm-1.tgz: Upgraded.
Upgraded to libpng-1.2.46 and libpng-1.4.8.
Fixed uninitialized memory read in png_format_buffer()
(Bug report by Frank Busse, related to CVE-2004-0421).
For more information, see:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0421
(* Security fix *)