Reviewed by Darin and Vicki.

        * Scripts/build-root: now builds in a sandbox and wont replace your system WebKit or Safari
          will now also build JavaScriptGlue and WebKitSystemInterface

JavaScriptGlue:

        Reviewed by Darin and Vicki.

        * JavaScriptGlue.xcodeproj/project.pbxproj:
          Change to use $(SYSTEM_LIBRARY_DIR) consistently and place
          $(NEXT_ROOT) in a few spots to make build-root work.

WebBrowser:

        Reviewed by Darin and Vicki.

        * WebBrowser.xcodeproj/project.pbxproj:
          Change to use $(SYSTEM_LIBRARY_DIR) consistently and place
          $(NEXT_ROOT) in a few spots to make build-root work.

WebKitSystemInterface:

        Reviewed by Darin and Vicki.

        * WebKitSystemInterface.xcodeproj/project.pbxproj:
          Change to use $(SYSTEM_LIBRARY_DIR) consistently and place
          $(NEXT_ROOT) in a few spots to make build-root work.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@12210 268f45cc-cd09-0410-ab3c-d52691b4dbfc