RFR: 8264509: jdk8u MacOS zipped debug symbols won't build

[Andrew Leonard]

Hi,
Please can I request a review for this fix on jdk8u mac, following merging
of the debug symbols support PR
https://bugs.openjdk.java.net/browse/JDK-8262730, i've discovered that
trying to build on jdk8u mac with default configure options, which will
default to zipped, will fail on Mac as there is a missing rule to copy the
.diz. The following fix simply adds that missing rule:
 webrev: http://cr.openjdk.java.net/~aleonard/8264509/webrev.00/
 bug: https://bugs.openjdk.java.net/browse/JDK-8264509

Please can I get a review and sponsor to merge,
thank you
Andrew