Comment 5 for bug 1908297

Reviewed: https://review.opendev.org/c/starlingx/tools/+/786144
Committed: https://opendev.org/starlingx/tools/commit/e7ee5e2102c999cc763c3e70fbc753fbe2f8d6a7
Submitter: "Zuul (22348)"
Branch: f/centos8

commit e7ee5e2102c999cc763c3e70fbc753fbe2f8d6a7
Author: Scott Little <email address hidden>
Date: Tue Dec 15 14:17:34 2020 -0500

    tidy stx/downloads directory

    $MY_REPO/stx/downloads contains links to tarballs and other files
    relevant to the build. It is populated by populate_downloads.sh.
    On subsequent runs, new links might be added, but old links are
    not cleaned up.

    Adopt the convention used by generate-centos-repo.sh of moving
    the old content under a timestamp backup directory, leaving
    an empty directory to re-populate.

    Closes-bug: 1908297
    Signed-off-by: Scott Little <email address hidden>
    (cherry picked from commit 1fd6f3f636ec7b0780815120f10e1beb545bc07f)
    Change-Id: Ibed5e57054628cf147f0873c3008ef1e2feed924