Mirror jdk 8u to Skara

[Andrew Haley]

I'm looking at https://github.com/openjdk and I can't see any
old OpenJDK trees. (By "old" I mean from before we went over to
a unified repo.)

Can we have a mirror of jdk8u, please? I'd like to kick the tyres,
and if it works well we can consider moving to it.

Thanks,

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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