[devtools] make a copy of the xvfb-run script so we can kill it properly
Since changeset a3d3bdd46463 we don't run firefox directly but through a
wrapper script. This meant that on stopping the test, we would kill
that wrapper script but leave the Xvfb server and firefox processes
running. So make a local copy of xvfb-run, and make it kill Xvfb when
it goes down, not just when its client exits.
This package was debianized by Logilab <contact@logilab.fr>.
It was downloaded from ftp://ftp.logilab.org/pub/cubicweb
Upstream Author:
Logilab <contact@logilab.fr>
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