libpng 1.6.20-1, libpng12-1.2.55-1

[Yaakov Selkowitz]

The following packages have been uploaded to the Cygwin distribution:

* libpng12-1.2.55-1
* libpng12-devel-1.2.55-1
* libpng16-1.6.20-1
* libpng16-devel-1.6.20-1
* libpng-devel-1.6.20-1
* libpng-tools-1.6.20-1

libpng is the official reference library for the Portable Network
Graphics (PNG) image format.

These releases include a fix for CVE-2015-8126:

https://bugzilla.redhat.com/show_bug.cgi?id=1281756

--
Yaakov