oeqa: archiver: Add basic tests for all archiver modes
6 new test cases are added to cover the various archiver modes
documented at the top of archiver.bbclass. Each test sets the
appropriate configuration options, runs the `do_deploy_archives` task
for the selftest-ed recipe and checks for the presence of the expected
archive file.
Signed-off-by: Paul Barker <paul@betafive.co.uk> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
