Reviewed by Steve.

        Add JavaScriptCore API to the build.
        * API/JSBase.cpp:
        * API/JSCallbackConstructor.cpp:
        * API/JSCallbackFunction.cpp:
        * API/JSCallbackObject.cpp:
        * API/JSClassRef.cpp:
        * API/JSContextRef.cpp:
        * API/JSObjectRef.cpp:
        * API/JSStringRef.cpp:
        * API/JSValueRef.cpp:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * os-win32/stdbool.h: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@16371 268f45cc-cd09-0410-ab3c-d52691b4dbfc