dev-python/portio: fix link with lld

Closes: https://bugs.gentoo.org/785787
Signed-off-by: Theo Anderson <telans@posteo.de>

dev-python/portio/portio-0.5.ebuild

@@ -18,3 +18,11 @@ SLOT="0"
 KEYWORDS="~amd64"
 
 DOCS=( index.rst )
+
+src_prepare() {
+	sed -e '/include_dirs/d' \
+		-e '/library_dirs/d' \
+		-i setup.py || die
+
+	distutils-r1_src_prepare
+}