fix/build_package: workspace cleanup when jenkins ci is not set

When `jenkins_run` is not set workspace is cleaned up either if
`dont_clean` flag is set. This removes any previous file storage
in the workspace which may cause the job to fail.

Signed-off-by: Leandro Belli <leandro.belli@arm.com>
Change-Id: I740ef5c06e0734ea424d0d4c959ada24b6cde61e
1 file changed