Clean before installing packages

src/freedombone-image-customise

@@ -740,6 +740,9 @@ case "$MACHINE" in
 esac
 
 set_apt_sources $BUILD_MIRROR
+chroot "$rootdir" apt-get clean
+chroot "$rootdir" rm -rf /var/lib/apt/lists/*
+chroot "$rootdir" apt-get clean
 chroot "$rootdir" apt-get update
 
 cat > $rootdir/usr/sbin/policy-rc.d <<EOF