Merge ppc port into jdk7u-dev

[Lindenmaier, Goetz]

Hi,

I assembled webrevs for merging the ppc port from
http://hg.openjdk.java.net/ppc-aix-port/jdk7u/hotspot/
into the main jdk7u repository:
http://cr.openjdk.java.net/~goetz/wr16/ppc-port/tree1/

There are no changes to jaxp (besides to the .hgtags file)
so I skipped that repo.

Please have a look at all the webrevs.  If changes are
required, I'll do them in the ppc-aix-port repository
and assemble new merge webrevs.  I think eventually
the .hgtags files should be reset.

Best regards,
  Goetz.