Delete dbgsym debs to save space
This is an attempt to fix the following problem:
Uploading artifacts...
/builds/nordugrid/arc/*.orig.tar.gz: found 1 matching files
/builds/nordugrid/arc/*.debian.tar.*: found 1 matching files
/builds/nordugrid/arc/*.dsc: found 1 matching files
/builds/nordugrid/arc/*.deb: found 31 matching files
ERROR: Uploading artifacts to coordinator... too large archive id=6767 responseStatus=413 Request Entity Too Large status=413 Request Entity Too Large token=vxbb7H5D
FATAL: Too large
ERROR: Job failed: exit code 1