Reviewed by Cameron Zwarich.

        Fix for bug #21387 - using SamplingTool with CTI.

        (1) A repatch offset offset changes due to an additional instruction to update SamplingTool state.
        (2) Fix an incusion order problem due to ExecState changes.
        (3) Change to a MACHINE_SAMPLING macro, use of exec should now be accessing global data.

        * VM/CTI.h:
        (JSC::CTI::execute):
        * VM/SamplingTool.h:
        (JSC::SamplingTool::privateExecuteReturned):
        * kjs/Shell.cpp:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@37316 268f45cc-cd09-0410-ab3c-d52691b4dbfc