libpng: upgrade 1.6.35 -> 1.6.36
For changes, see:
https://sourceforge.net/p/libpng/code/ci/libpng16/tree/CHANGES
License-Update: Added authors to license, formatting, version changes,
export classification clarification and a new libpng2 license with
clarification:
The new libpng license comprises the terms and conditions from the zlib
license, and the disclaimer from the Boost license. The legacy libpng
license license, used until libpng-1.6.35, is appended to the
new license, following the precedent established in the Python Software
Foundation License version 2.
(From OE-Core rev:
099aecfaa3baf6b24c2b751da92d7d2fa0266bf9)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
