hg: jdk8u/jdk8u-dev: 8068927: AARCH64: better handling of aarch64- triples

[dean.long at oracle.com]

Changeset: 281cff475536
Author:    dlong
Date:      2015-01-15 15:12 -0500
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/rev/281cff475536

8068927: AARCH64: better handling of aarch64- triples
Summary: convert aarch64- to arm-, let upstream code do the work, then convert back to aarch64-
Reviewed-by: ihse

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