Unreviewed WinCE build fix for r83808.

        It seams that the MSVC compiler for WinCE does not handle the friend scope correct.
        Add an addtional inline function to StructureTransitionTable to work around this.

        * runtime/Structure.h:
        (JSC::StructureTransitionTable::keyForWeakGCMapFinalizer):
        * runtime/StructureTransitionTable.h:
        (JSC::StructureTransitionTable::WeakGCMapFinalizerCallback::keyForFinalizer):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83827 268f45cc-cd09-0410-ab3c-d52691b4dbfc