Download restricted trace data To ensure that things are built we need to update the modification time on the files we download. This adds a script to download the requested files and then touch everything that was downloaded in the traces folders. Bug: chromium:1096577 Change-Id: Idce6abb6100e7c662429a9db71b1a44a78dd88a6 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2252544 Reviewed-by: Cody Northrop <cnorthrop@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com>