9808c7 vars/build.vars: added libpng-1.6.31

1 file Authored by Marty Plummer 6 years ago, Committed by Lucio Andrés Illanes Albornoz 6 years ago,
    vars/build.vars: added libpng-1.6.31
    
    Needed on my end to build freetype2
    
    Signed-off-by: Marty Plummer <ntzrmtthihu777@gmail.com>
    
        
file modified
+4 -1