librsvg: update to 2.59.1.

[icp1994]

Testing the changes

• I tested the changes in this PR: YES

Local build testing

• I built this PR locally for my native architecture: x86_64

I am not sure if this warrants rebuilding revdeps, hopefully someone can opine on that.

[icp1994]

If I'm reading the logs right, /usr/bin/cargo is not available in cross 🤔

[chrysos349]

fix cross

if [ "$CROSS_BUILD" ]; then
	XBPS_CROSS_RUSTFLAGS+=" -L${XBPS_BUILDDIR}/${pkgname}-${version}/build/rsvg"
	configure_args="-Dtriplet=${XBPS_CROSS_RUST_TARGET}"
	post_patch() {
		vsed -i meson.build -e "s/not meson.is_cross_build() and //"
	}
fi

[icp1994]

Thanks, that worked.

[classabbyamp]

missing dependency: 7e715df, caused build fails in ART

[classabbyamp]

also, it seems the pkgconfig file is missing cflags on cross. this broke ART and appstream.