* tools/buildbot/slaves/bb-openbsd/svnclean.sh: Do not fail at 'svn cleanup'
step if no working copy exists yet.
set -e
set -x
-svn cleanup ../build
+(test -d ../build/.svn && svn cleanup ../build)
(test -h ../svn-trunk || ln -s build ../svn-trunk)
for i in $(jot - 6 12); do
(test -h ../svn-1.${i}.x || ln -s build ../svn-1.${i}.x)
