regent: Add support for LLVM 3.5 to setup_env.py.
regent: Add support for LLVM 3.5 to setup_env.py.

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion