Exclude the spammy "l10n_master" branch from Travis CI builds.
Exclude the spammy "l10n_master" branch from Travis CI builds.

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