Added cgi/product_multilingual.pl to Travis CI build.
Added cgi/product_multilingual.pl to Travis CI build.

openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server,openfoodfacts/openfoodfacts-server