RunGen: parse_extents() should fill in strides
RunGen: parse_extents() should fill in strides

Former-commit-id: 13c16908771494516626a3f55ce9f96a17dbcf10
Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide