By David FrenchDUBAI, June 10 (Reuters) - Banque Saudi Fransi 1050.SE (BSF), the kingdom&aposs fourth-largest listed lender, will complete a 2 billion riyal ($533 million) capital-boosting sukuk issue by the end of this month, banking sources said on Tuesday.Pricing of the trade, which will boost the bank&aposs Tier 2 - or supplementary - capital, is at 140 basis points over the Saudi interbank of