Another tech giant that says it must import foreign workers because there aren’t enough skilled American workers in the industry is laying off thousands of workers.Qualcomm — a major producer of smartphone chips — announced last week it’s eliminating 15 percent of its workforce or about 4,500 employees, just weeks after fellow tech giant Microsoft announced a massive round of layoffs.Both companies are top beneficiaries of the H-1b visa program, which backers say allows companies to temporarily hire foreign workers for jobs they can’t find qualified Americans workers to fill. Critics contend the program is really used to cut costs. (RELATED:...