** Shares in Dubai engineering and construction firm Drake and Scull International (DSI) drop 2.4 percent to 0.805 dirham ** Technical support at May low of 0.80 dirham ** Company reported 38 percent drop in first-quarter profit to 25.1 million dirhams ($6.83 million) ** Global Investment House had forecast DSI would make 38 million dirhams ** DSI complained about major operational setbacks in Saudi Arabia and liquidity crunch in industry ** Dubai's stock index inches up 0.1 percent (Reporting by Olzhas Auyezov; Editing by Andrew Torchia)