install the new axis icons in the deb

The commit "axis: drop seticon hack" added some new icons for Axis,
but forgot to include them in the install.  Which means they get left
out of the debian package, which means Axis won't start when installed
from the deb.

This commit fixes that problem.
tests: rename files so dh_clean doesn't eat them

When we build our debian package, the "install" build step in debian/rules
runs 'dh_clean', which apparently removes all files with names ending
in .orig.  Hrm.  Rename these files so debian leaves them alone.
Merge branch 'v2.5_branch'