Fix number of parameters passed into PrepareCallCFunction in code age stubs

In r16710 Additional parameter (Isolate) was added to parameter lists of some native functions called from the generated code. However, corresponding PrepareCallCFunction arguments changed only on i32. This CL updates other architectures to match actual value.

BUG=None
LOG=None
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/74753006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18379 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[platform] Implement a worker pool

We don't use the worker pool yet, however, there are tests. Yay. The
next step is to use the worker pool for parallel sweeping.

I've also started to move the platform related files into a sub
directory. The goal is to eventually build all the platform stuff as
a separate library which is used by d8 and cctest (and other embedders
that wish to use the default implementation) but not by chromium.

BUG=v8:3015
R=hpayer@chromium.org, svenpanne@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/104583003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18380 ce2b1a6d-e550-0410-aec6-3dcde31c8c00