License hasn't changed, just updated the md5 checksums due to trivial
date changes within the text (and the position of the license text
within png.h).
Addresses CVE-2011-3045
Fixes [YOCTO #2352]
(From OE-Core rev: 6e2235a4d769b16ebf68d6bbed56d8bcc0e0c83f)
Signed-off-by: Scott Garman <scott.a.garman@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>