harfbuzz: build against libpng16
harfbuzz: build against libpng16

moochris/haikuports,nielx/haikuports,koletzky/haikuports,haikuports/haikuports,miqlas/haikuports,miqlas/haikuports,nielx/haikuports,haikuports/haikuports,Begasus/haikuports,koletzky/haikuports,Begasus/haikuports,koletzky/haikuports,miqlas/haikuports,nielx/haikuports,haikuports/haikuports,Begasus/haikuports,moochris/haikuports,haikuports/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,haikuports/haikuports