Historically Vere has used a simple 'vx.y.z' versioning scheme that
predates the monorepo structure introduced in 7ce50ad. Going forward
it's expected that our blessed runtime king/serf binaries will follow
the scheme 'urbit-vx.y.z' to disambiguate them from other repository
subprojects.
This renames Vere release tarballs as their version followed by their
target platform. So with the updated tag scheme, instead of e.g.
'urbit-linux64-vx.y.z.tgz' these will appear along the lines of
'urbit-vx.y.z-linux64.tgz'.
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