Removed dependency on gengen.sh/GenGen.cpp.
Removed dependency on gengen.sh/GenGen.cpp.


Former-commit-id: a77989e6ce93b719acbd60ce5a48d3cc29df2956
darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide