Commit
7b95fac0221dfb2b78d37da0165381408066ba71
by Oliver Smithcontrib/jenkins: add SKIP_CLEAN_WORKSPACE
In order to run this script from pyosmocom's contrib/jenkins.sh script,
we want to skip the clean workspace step. Add an environment variable to
do that.
Related: OS#6570
Change-Id: Ic8dc9b85da17719195f7374d37eccb4dedba6ce8