Fixed: Yakkety and Zesty are using libpng-dev now

--HG--
branch : develop

dist/debian/yaketty/debian/control

@@ -3,7 +3,7 @@ Priority: extra
 Maintainer: Debian Games Team <pkg-games-devel@lists.alioth.debian.org>
 Uploaders: Luboš Novák <alvinx12@centrum.cz>, Cédric OCHS <kervala@gmail.com>
 Build-Depends: debhelper (>= 9), cmake (>= 2.6), libxml2-dev,
- libgl1-mesa-dev, libjpeg8-dev | libjpeg62-dev, libpng12-dev, libopenal-dev,
+ libgl1-mesa-dev, libjpeg8-dev, libpng-dev, libopenal-dev,
  libfreetype6-dev, libxxf86vm-dev, libxrandr-dev, libxrender-dev,
  libvorbis-dev, libsquish-dev, libcurl4-openssl-dev, libluabind-dev,
  libboost-dev, libmysqlclient-dev,

dist/debian/zesty/debian/control

@@ -3,7 +3,7 @@ Priority: extra
 Maintainer: Debian Games Team <pkg-games-devel@lists.alioth.debian.org>
 Uploaders: Luboš Novák <alvinx12@centrum.cz>, Cédric OCHS <kervala@gmail.com>
 Build-Depends: debhelper (>= 9), cmake(>= 2.6), libxml2-dev,
- libgl1-mesa-dev, libjpeg8-dev | libjpeg62-dev, libpng12-dev, libopenal-dev,
+ libgl1-mesa-dev, libjpeg8-dev, libpng-dev, libopenal-dev,
  libfreetype6-dev, libxxf86vm-dev, libxrandr-dev, libxrender-dev,
  libvorbis-dev, libsquish-dev, libcurl4-openssl-dev, libluabind-dev,
  libboost-dev, libmysqlclient-dev,