Moving the settings to a .vsprops file means that we will only have to
        change a single setting to affect all configurations, instead of one
        setting per configuration.

        Reviewed by Steve Falkenburg.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.vcproj/WTF/WTF.vcproj:
        * JavaScriptCore.vcproj/jsc/jsc.vcproj:
        * JavaScriptCore.vcproj/testapi/testapi.vcproj:
        Moved settings from these files to the new .vsprops files. Note that
        testapi.vcproj had a lot of overrides of default settings that were
        the same as the defaults, which I've removed.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCoreCommon.vsprops: Added.
        * JavaScriptCore.vcproj/WTF/WTFCommon.vsprops: Added.
        * JavaScriptCore.vcproj/jsc/jscCommon.vsprops: Added.
        * JavaScriptCore.vcproj/testapi/testapiCommon.vsprops: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@43082 268f45cc-cd09-0410-ab3c-d52691b4dbfc