UPDATE 1-UAE's Al Hilal Bank to price $500 mln perpetual sukuk

(Adds launch pricing)DUBAI, June 24 (Reuters) - Abu Dhabi&aposs Al Hilal Bank will price its $500 million capital-boosting sukuk issue later on Tuesday at the tight end of revised guidance, a document from lead managers said, as high demand helped reduce the borrowing cost.The transaction, which has a perpetual tenor but can be bought back by the lender after the fifth year, will price at the tigh