media-libs/lib3mf: don't use bundled headers

The includes are hardcoded. This is fixed in newer releases, so instead of
patching we just link the system includes to the place where they are expected.

Closes: https://bugs.gentoo.org/944790
Signed-off-by: Paul Zander <negril.nx+gentoo@gmail.com>
Signed-off-by: Sam James <sam@gentoo.org>

media-libs/lib3mf/lib3mf-2.2.0-r1.ebuild

@@ -39,6 +39,14 @@ PATCHES=(
 	"${FILESDIR}"/${P}-include-cstdint.patch
 )
 
+src_prepare() {
+	cmake_src_prepare
+
+	rm -r Include/Libraries/{libzip,zlib} || die
+	ln -s "${EPREFIX}/usr/include" Include/Libraries/zlib || die
+	ln -s "${EPREFIX}/usr/include" Include/Libraries/libzip || die
+}
+
 src_configure() {
 	local mycmakeargs=(
 		-DCMAKE_INSTALL_INCLUDEDIR="include/${PN}"