The corstone1000-a320 FVP is a unique download and should be treated as
such in our CI. Split the relevant parts off, add it to the fvps.yml
file, workaround the staticdev and useless-rpath errors that were
present in the FVP tarball, and the correct depends in the machine
config file.
Also, add this machine to the CI so that any issues can be found with
this unique configuration.
Signed-off-by: Jon Mason <jon.mason@arm.com>