"tests/gem5/configs/download_check.py" is used by the
"test-resource-downloading" test (defined in
"tests/gem5/gem5-resources/test_download_resources.py" and ran as part
of the "very-long" suite).
Prior to this change "download_check.py" would download each resource,
check it's md5, then at the end of the script remove all the downloaded
resources. This is inefficient on disk space and was causing our
"very-long" suite of tests to require a machines with a lot of disk
space to run.
This change alters 'download_check.py" to remove each resource after the
md5 check. Thus, only one resource is ever downloaded and present at any
given time during the running of this script.
Change-Id: I38fce100ab09f66c256ccddbcb6f29763839ac40