[Cython] jenkins pyregr job problems

[Vitja Makarov]

It seems that something have changed after recent jenkins job
refactoring. Starting from build cython-vitek-tests-pyregr-py27-c #365
I got error about creating hard links in build logs:

[workspace] $ /bin/sh -xe /levi/scratch/hudson/tmp/hudson4308307797887194909.sh
+ /levi/scratch/robertwb/hudson/hudson/Scripts/get_latest_cython.sh
cython-vitek-build-py27
ln: creating hard link `./Cython-bdist-latest.tar.gz': File exists
ln: creating hard link `./Cython-sdist-latest.tar.gz': File exists
ln: creating hard link `./Cython-tests-latest.tar.gz': File exists

In regular cython tests I've rm -rf * so they run as expected.
But in pyregr jobs I don't so tests are run against old version of cython.

I think it's better to remove old files before creating hard link.

-- 
vitja.