Added forward declaration of operator<< for Halide::Module that already exists.
Added forward declaration of operator<< for Halide::Module that already exists.


Former-commit-id: 02afc8aadcb7def25ae5bb70bbe466164b7dcea7
darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide