[google] Merged trunk r169172 into google/integration

[Diego Novillo]

I've just merged trunk into google/integration.  Since this was
the first merge, I created:

- gcc/ChangeLog.google for all branch ChangeLogs.
- Added google/integration and google/main to svn.html.
- Modified DATESTAMP and BASE-VER to reference the last merge
  point.  --version should show:

  $ bin/gcc --version
  gcc (GCC) 4.6.0-google-integration 20110124 (trunk r169172) (experimental)


Tested on x86_64.


Diego.