Build system broken from r1261

r1261 added a reference to reftest.tmpl but didn't add the file, 
breaking the build system.

Because tracebacks are fun:

> Traceback (most recent call last):
>   File "tools/build-css21.py", line 90, in <module>
>     suite.buildInto(join('dist', 'css2.1'), indexer)
>   File "/home/gsnedders/Documents/other-projects/csswg-testsuite/tools/CSSTestLib/Suite.py", line 74, in buildInto
>     indexer.writeIndex(format)
>   File "/home/gsnedders/Documents/other-projects/csswg-testsuite/tools/CSSTestLib/Indexer.py", line 171, in writeIndex
>     format.dest('reftest.list'))
>   File "/home/gsnedders/Documents/other-projects/csswg-testsuite/tools/CSSTestLib/Indexer.py", line 104, in __writeTemplate
>     o = self.tt.process(template, data)
>   File "/usr/local/lib/python2.6/dist-packages/template/__init__.py", line 632, in process
>     output = self.__service.process(template, vars)
>   File "/usr/local/lib/python2.6/dist-packages/template/service.py", line 457, in process
>     template = context.template(template)
>   File "/usr/local/lib/python2.6/dist-packages/template/context.py", line 976, in template
>     self.throw(ERROR_FILE, "%s: not found" % name)
>   File "/usr/local/lib/python2.6/dist-packages/template/context.py", line 721, in throw
>     raise TemplateException(error, info, output)
> template.util.TemplateException: file error - reftest.tmpl: not found

-- 
Geoffrey Sneddon — Opera Software
<http://gsnedders.com/>
<http://www.opera.com/>