Add -p option to testkjs which pretty prints the files instead of executing them.

        * JavaScriptCore.exp:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * kjs/Parser.cpp:
        (KJS::Parser::prettyPrint):
        * kjs/Parser.h:
        * kjs/testkjs.cpp:
        (doIt):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@18337 268f45cc-cd09-0410-ab3c-d52691b4dbfc