hppa2.0w -> hppa64 conversion

[Michael Elizabeth Chastain]

Jeff Law writes:
> This patch fixes the tests in gdb.base to  use the new naming scheme.
> Patches for the other subdirectories will follow.

A similar patch to gdb.c++/templates.exp is pre-approved.  (Save you
a round trip).

I am in a pre-Christmas rush here with an office shutdown between
Christmas and New Year's.  I'll be catching up on my maintainer
duties starting December 27, especially reporting on Daniel Jacobowitz's
changes.  They are very good but some test cases changed results
to the downside.

Michael C