RFR(S): 7123386: RFE: Preserve universal builds of HotSpot on Mac OS X

[James Melvin]

Hi,

Please review the change to HotSpot to package JVM libraries in a
universal binary on Mac OS X. The current plan of record is to only
support a 64-bit JVM on Mac OS X. This solution preserves the option to
additionally include other architectures in the universal binary
in the future. It also further encapsulates platform specific makefile
changes for Mac OS X builds.

Feedback welcome...

WEBREV:
   http://cr.openjdk.java.net/~jmelvin/7123386/webrev.00

TESTS RUN:
   JPRT  2012-01-31-152453.jmelvin.7123386
   local Mac OS X builds/tests

Thanks,

Jim