startup: update syntax - `-c` creates also new database if doesn't exists

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@45733 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/init/grass.py

@@ -152,7 +152,7 @@ help_text = r"""
        _("Flags"),
        _("print this help message"),
        _("show version information and exit"),
-       _("create given location/mapset if it doesn't exist"),
+       _("create given database, location or mapset if it doesn't exist"),
        _("use text based interface"),
        _("and set as default"),
        _("use $DEFAULT_GUI graphical user interface"),