RFR (XXS): 7130404: [macosx] "os.arch" value should be "x86_64" for compatibility with Apple JDK6

[James Melvin]

Hi,

To maintain compatibility with Apple JDKs, a proposal will be made to
change the 'os.arch' system property from 'amd64' to 'x86_64' on Mac OS
X. Minor changes are required to the following repositories, for which
I've provided webrevs...

WEBREV:
   http://cr.openjdk.java.net/~jmelvin/7130404/hotspot/webrev.00
   http://cr.openjdk.java.net/~jmelvin/7130404/jdk/webrev.00

TESTING:
   JPRT job (2012-02-20-203901.jmelvin.hotspot)
   Notepad, SwingSet2, SPECjbb2005

This change will also impact a small number of internal tests and RE
scripts. The bundle names will also reflect the change amd64 -> x86_64.
HotSpot changes can be integrated first, with the JDK changes in the
following promotion. Should the proposal be rejected for 7u4, I
obviously withdraw the bugfix.

Feedback welcome,

Jim