archlinux: add missing python-setuptools makedepends

archlinux/PKGBUILD

@@ -9,7 +9,7 @@ arch=("x86_64")
 url="http://qubes-os.org/"
 license=('GPL')
 groups=()
-makedepends=(gcc make pkg-config qubes-vm-utils qubes-libvchan qubes-db-vm qubes-vm-xen libx11 python lsb-release pandoc)
+makedepends=(gcc make pkg-config qubes-vm-utils qubes-libvchan qubes-db-vm qubes-vm-xen libx11 python python-setuptools lsb-release pandoc)
 checkdepends=()
 provides=()
 conflicts=()