Status Win64 build

Mochitest-1 failure

This is WebGL issue. Actually, Win64 build has no ANGLE that is D3D -> OpenGL ES wrapper. ANGLE now supports Win64 building by r697, and I and ransGaming fix a Win64 bug by r707. After merging these into m-c, it will pass mochitest-1.

test failures on jstest

I cannot reproduce this on my development machine. So if you know reproduce step, let me know. I think that this is GC issue, but I am still investigating...

But if this is compiler issue, this will be fixed using VS2010SP1. We have a plan to upgrade toolchains to VS2010SP1 as default.