grafx2: use lib:libpng16 (#3778)

media-gfx/grafx2/grafx2-2.6.recipe

@@ -8,7 +8,7 @@ HOMEPAGE="http://grafx2.tk"
 COPYRIGHT="1995-2001 Sunset Design
 	2007-2019 GrafX2 project team"
 LICENSE="GNU GPL v2"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://gitlab.com/GrafX2/grafX2/-/archive/v$portVersion/grafX2-v$portVersion.tar.bz2"
 SOURCE_DIR="grafX2-v$portVersion"
 CHECKSUM_SHA256="a672d381df55a8180febb005cbafbbfc87b8f7eeec9743acdc33214cc59a2e00"
@@ -25,7 +25,7 @@ REQUIRES="
 	lib:libiconv
 	lib:libjpeg
 	lib:liblua
-	lib:libpng
+	lib:libpng16
 	lib:libsdl
 	lib:libsdl_image
 	lib:libsdl_ttf
@@ -39,7 +39,7 @@ BUILD_REQUIRES="
 	devel:libiconv
 	devel:libjpeg
 	devel:liblua
-	devel:libpng
+	devel:libpng16
 	devel:libsdl
 	devel:libsdl_image
 	devel:libsdl_ttf
@@ -67,5 +67,7 @@ INSTALL()
 	mkdir -p $dataDir
 	make install DESTDIR=$prefix PREFIX=/ datarootdir=/$relativeDataRootDir
 
+	rm -rf $dataDir/{applications,icons,metainfo}
+
 	addAppDeskbarSymlink $binDir/grafx2 GrafX2
 }