Make varying attributes code only consider GLSL loops.
Make varying attributes code only consider GLSL loops.


Former-commit-id: 77360ed704228bfce168d7b2455996024b04d5a5
Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide