jenkins: properly clean previous artifacts

Drop the second 'rm -f' from the rm shell command (typo).

Remove all artifacts matching *.build-*.{tgz,md5} because if a job changes the
name of its artifact, the previous artifacts would remain.

(I hit this with the new scripts being originally wrong and all producing
'osmo-msc.*' artifacts, and those stuck around in the workspace even after the
name was fixed.)

Change-Id: I00d246226f4c723696bb737ed707cfd0e4c33714
1 file changed