Libpng version in stable branch is rejected by Google Play

[Beyka]

Hello! All application that contains libpng from stable branche are rejected by google play because it contains a security vulnerability disclosed in CEV-2015-8540.
Easiest way to fix problem is change libpng version in stable branch to 1.4.19 from libpng sourceforge repository.

[mgood7123]

what do you mean?

[mgood7123]

could you provide a pull request with these changes and confirm submission in google play