Added a test to compute 2D DFTs.
Added a test to compute 2D DFTs.


Former-commit-id: 760b8bc60cf1b5e75bfc241f33fcf348d76b366d
Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide