64-bit version now builds on Windows again in both release and debug mode.

The Visual Studio project files have been updated so that all three configurations work (32-bit, 64-bit and 32-bit with ARM simulator). They all convert from Visual Studio 2005 to Visual Studio 2008.

TBR=lrn@chromium.org
Review URL: http://codereview.chromium.org/549174

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3722 ce2b1a6d-e550-0410-aec6-3dcde31c8c00