Always run apt-get update after dpkg --add-architecture

install_deps() in sh-test-lib only triggers apt-get update every 6
hours. It does not see that the apt cache is outdated after adding a new
architecture, so the update needs to be called manually.

Change-Id: I60a9bb5f2ee4af2bf1a7d58f8e74d354fa9ce4af
2 files changed