* test/disambiguate/test.test: Remove .diff before running the test.

        * test/disambiguate/class-03.cc, test/disambiguate/enum-02.cc,
        * test/disambiguate/enum-04.cc, test/disambiguate/function-05.cc,
        * test/disambiguate/power-02.cc, test/disambiguate/template-09.cc,
        * test/disambiguate/power-02.detcc, test/disambiguate/inherit-09.detcc,
        * test/disambiguate/inherit-09.cc, test/disambiguate/inherit-08.detcc,
        * test/disambiguate/inherit-08.cc, test/disambiguate/inherit-07.detcc,
        * test/disambiguate/inherit-07.cc, test/disambiguate/inherit-06.detcc,
        * test/disambiguate/inherit-06.cc, test/disambiguate/class-03.detcc,
        * test/disambiguate/template-09.detcc,
        * test/disambiguate/function-06.detcc,
        * test/disambiguate/function-05.detcc, test/disambiguate/enum-04.detcc,
        * test/disambiguate/enum-02.detcc: Fix tests, make them pass with g++.

        * test/g++/template/Makefile.am: Fix .test link creation.