Update the build rules for the Windows/WinCairo builds to no longer reference or link to pthreadsVC2.dll. Nothing in JavaScriptCore uses the pthreads library on the Windows port, so linking to the library serves no purpose.
There are a handful of remaining references. This update attempts to clear out that last couple of them.
Created attachment 200049 [details] Patch
I don't know why Visual Studio does weird things like change the last line of the file; I can't easily prevent that when generating the patch. :-(
Committed r149320: <http://trac.webkit.org/changeset/149320>