Mariadb standalone: Fix compilation error. Missing define python2.7

software/mariadb/software.cfg

@@ -5,6 +5,7 @@ extends =
   ../../component/dcron/buildout.cfg
   ../../component/logrotate/buildout.cfg
   ../../component/stunnel/buildout.cfg
+  ../../component/python-2.7/buildout.cfg
   ../../component/lxml-python/buildout.cfg
   ../../component/gzip/buildout.cfg
   ../../component/duplicity/buildout.cfg