update travis for Rust code - hail Mary
update travis for Rust code - hail Mary

Ezhil-Language-Foundation/open-tamil,Ezhil-Language-Foundation/open-tamil,arcturusannamalai/open-tamil,arcturusannamalai/open-tamil,Ezhil-Language-Foundation/open-tamil,Ezhil-Language-Foundation/open-tamil,arcturusannamalai/open-tamil,Ezhil-Language-Foundation/open-tamil,Ezhil-Language-Foundation/open-tamil,Ezhil-Language-Foundation/open-tamil,Ezhil-Language-Foundation/open-tamil,arcturusannamalai/open-tamil,arcturusannamalai/open-tamil,arcturusannamalai/open-tamil,Ezhil-Language-Foundation/open-tamil,arcturusannamalai/open-tamil