change .path files to be loaded from GitHub

2015/hou/index.html

@@ -250,7 +250,7 @@ result. Error messages become garbled, though.</p></li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/hou/.entry.json">.entry.json</a> - description of entry in JSON</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/hou/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
 <li><a href="large">large</a> - large input data</li>
-<li><a href=".path">.path</a> - directory path from top directory</li>
+<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2015/hou/.path">.path</a> - directory path from top directory</li>
 </ul>
 
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