fix AUR workflow (#10)

scripts/ci/install_makepkg.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -e
+
+for i in \
+	"makepkg_6.0.2-3_amd64.deb" \
+	"libalpm13_13.0.2-3_amd64.deb" \
+	"pacman-package-manager_6.0.2-3_amd64.deb"; do
+	wget -O/tmp/$i https://fr.archive.ubuntu.com/ubuntu/pool/universe/p/pacman-package-manager/$i
+	dpkg -i /tmp/$i || true
+done
+
+apt -f install -q