libpng: add metafile support, cleanups, thanks to cowbalt

Signed-off-by: Stephan Raue <stephan@openelec.tv>

packages/graphics/libpng/build

@@ -2,9 +2,6 @@
 
 . config/options $1
 
-$SCRIPTS/build toolchain
-$SCRIPTS/build zlib
-
 cd $PKG_BUILD
 ac_cv_lib_z_zlibVersion=yes \
 ./configure --host=$TARGET_NAME \
@@ -21,4 +18,4 @@ $MAKEINSTALL
 $SED "s:\([\"'= ]\)/usr:\\1$SYSROOT_PREFIX/usr:g" \
   $SYSROOT_PREFIX/usr/bin/libpng*-config
 
-cp -PR $SYSROOT_PREFIX/usr/bin/libpng*-config $ROOT/$TOOLCHAIN/bin
+cp -P $SYSROOT_PREFIX/usr/bin/libpng*-config $ROOT/$TOOLCHAIN/bin

packages/graphics/libpng/install

@@ -3,4 +3,4 @@
 . config/options $1
 
 mkdir -p $INSTALL/usr/lib
-  cp -PR $PKG_BUILD/.libs/libpng14.so* $INSTALL/usr/lib
+  cp -P $PKG_BUILD/.libs/libpng14.so* $INSTALL/usr/lib

packages/graphics/libpng/meta

@@ -0,0 +1,14 @@
+PKG_NAME="libpng"
+PKG_VERSION="1.4.4"
+PKG_REV="1"
+PKG_ARCH="any"
+PKG_LICENSE="OSS"
+PKG_SITE="http://www.libpng.org/"
+PKG_URL="http://downloads.sourceforge.net/libpng/$PKG_NAME-$PKG_VERSION.tar.bz2"
+PKG_DEPENDS="zlib"
+PKG_BUILD_DEPENDS="toolchain zlib"
+PKG_PRIORITY="optional"
+PKG_SECTION="graphics"
+PKG_SHORTDESC="libpng: Portable Network Graphics (PNG) Reference Library"
+PKG_LONGDESC="PNG (Portable Network Graphics) is an extensible file format for the lossless, portable, well-compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits."
+PKG_IS_ADDON="no"

packages/graphics/libpng/url

@@ -1 +0,0 @@
-http://downloads.sourceforge.net/libpng/libpng-1.4.4.tar.bz2