regent: allow runs-with flag in compile_fail tests
regent: allow runs-with flag in compile_fail tests

chuckatkins/legion,chuckatkins/legion,StanfordLegion/legion,chuckatkins/legion,sdalton1/legion,sdalton1/legion,chuckatkins/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,sdalton1/legion,chuckatkins/legion,sdalton1/legion,sdalton1/legion,chuckatkins/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,chuckatkins/legion,sdalton1/legion,StanfordLegion/legion