deps.sh: Correctly detect the apt-utility lacking install-support
deps.sh: Correctly detect the apt-utility lacking install-support

In earlier versions of Ubuntu (like 12.04) and other Debian-based distributions, the APT-utility exists without support for the install-command.
This causes execution of deps.sh to fail since c8cc356 when running on these older versions of apt. This commit solves this issue by attempting
a simulated install of dpkg.

sundhaug92/binwalk,sundhaug92/binwalk