.ci: Allow fedora support in setup.sh script
.ci: Allow fedora support in setup.sh script

The setup.sh script was assuming the installation of libudev package
has to be done through apt, but this is Ubuntu specific.
This patch allows for Fedora package management in case we detect
Fedora as the underlying OS.

Fixes #118

Signed-off-by: Sebastien Boeuf <90b401417360b1924ef3f520ddee932686110f85@intel.com>

clearcontainers/agent,clearcontainers/agent