A jury in California ruled that a clothing company should pay more than $1 million to four American Airlines flight attendants who blamed chemicals used in the production of their uniforms for causing a variety of ailments including rashes, headaches and breathing problems. The verdict last week could be just the tip of the iceberg: Lawyers say they represent more than 400 other flight attendants who are making the same claims against the uniform maker. A lawyer for the flight attendants called