Disable LTCG/PGO for grammar.cpp and nodes.cpp.
        PGO on these files causes us to hang.
        
        Copy newer vsprops files from relative WebKitLibraries path to environment variable based path.
        
        Reviewed by Oliver.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreGenerated.make:

WebCore:

        Disable LTCG/PGO for all of WebCore for now.
        We'll re-enable this as part of follow-on PGO work.
        
        Reviewed by Oliver.

        * WebCore.vcproj/WebCore.vcproj:

WebKit/win:

        Use PGO to build WebKit.dll.
        
        Reviewed by Oliver.

        * WebKit.vcproj/WebKit.pgd: Added.
        * WebKit.vcproj/WebKit.vcproj:

WebKitLibraries:

        Disable two PGO/LTCG specific warnings.
        
        Reviewed by Oliver.

        * win/tools/vsprops/common.vsprops:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@30981 268f45cc-cd09-0410-ab3c-d52691b4dbfc