make test: archive failed test data with build logs.

- Fix invocation of compress_failed.sh
- Fix compress_failed to copy compressed results
  files to $WORKSPACE/archives and return failure
  exit code.

Failed test case data will be copied to logs.fd.io
and found in the archives/<make test data dir>-FAILED
directory in the build log link in the
vpp-verify-master-ubuntu1604 jenkins job page.

For example:
https://logs.fd.io/production/vex-yul-rot-jenkins-1/vpp-verify-master-ubuntu1604/7353/archives/

Change-Id: Ife9a0737115e69c0a8441e3bb0133af1528d909b
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>