dev-python/versioneer: Workaround build failure against older ver.

Closes: https://bugs.gentoo.org/870241
Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/versioneer/versioneer-0.26.ebuild

@@ -35,6 +35,14 @@ BDEPEND="
 	)
 "
 
+python_compile() {
+	cat > "${T}"/versioneer.py <<-EOF || die
+		raise ImportError("Please pretend I'm not here!")
+	EOF
+	local -x PYTHONPATH=${T}:${PYTHONPATH}
+	distutils-r1_python_compile
+}
+
 python_test() {
 	esetup.py make_versioneer