now files in etc are installed to addons/etc/extension_name/ as in $GISBASE/etc/

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@48896 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/g.extension/g.extension.py

@@ -338,7 +338,7 @@ def install_extension():
                'HTMLDIR=%s' % dirs['html'],
                'MANDIR=%s' % dirs['man1'],
                'SCRIPTDIR=%s' % dirs['scripts'],
-               'ETC=%s' % dirs['etc']
+               'ETC=%s' % os.path.join(dirs['etc'],options['extension'])
                ]
     
     installCmd = ['make',