deb: install Tarantool repo in prebuild.sh

`Packpack` installs dependencies using default apt repo. To provide
the latest version of Tarantool 1.10 (the latest of the lower supported
version), `prebuild.sh` script wich installs Tarantool repo was added
to debian spec folder.

debian/prebuild.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+set -e -o pipefail
+
+curl -LsSf https://www.tarantool.io/release/1.10/installer.sh | sudo bash