g++ >= 4.6 no longer required by test suite
g++ >= 4.6 no longer required by test suite

Former-commit-id: 53b640b59d5ec241ce70036196e466d5a6f1c4f1
Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide