RFR: 8080600: AARCH64: testlibrary does not support AArch64

[Roland Westrelin]

> http://cr.openjdk.java.net/~aph/8080600-2/

I’m pushing it.

> OK.  As a general rule should I base hotspot patches on hs-comp/hotspot
> rather than dev/hotspot?  It's a bit awkward because I don't push to
> dev/hotspot.

Patches should be made against the repo that they are the most likely to be pushed to i.e. compiler changes against hs-comp. 

Roland.