TUNIS (Reuters) - Tunisia's Prime Minister designate Youssef Chahed said on Friday the country would need to adopt an austerity programme including public sector job cuts and new taxes if current economic difficulties continued. His warning to parliament came as lawmakers were about to vote on whether to accept his new cabinet. Tunisia is struggling with lower tourism revenues after two major attacks on foreign tourists last year hit what is one of the country's key industries. (Reporting by Tarek Amara; writing by Patrick Markey; editing by John Stonestreet)