v.extract: add 'random' keyword

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@66087 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.extract/main.c

@@ -78,6 +78,7 @@ int main(int argc, char **argv)
     G_add_keyword(_("extract"));
     G_add_keyword(_("select"));
     G_add_keyword(_("dissolve"));
+    G_add_keyword(_("random"));
     module->description =
 	_("Selects vector features from an existing vector map and "
 	  "creates a new vector map containing only the selected features.");