Check result code of getenv_s(); add namespace to avoid possible collisions with Util.h
Check result code of getenv_s(); add namespace to avoid possible collisions with Util.h

kgnk/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,psuriana/Halide,psuriana/Halide,kgnk/Halide,kgnk/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,kgnk/Halide,kgnk/Halide