shader: honor front-face input format

src/graphics/shader/shader.h

@@ -196,6 +196,7 @@ struct ShaderPixelInputInfo {
 	bool                                           ps_pos_z                     = false;
 	bool                                           ps_pos_w                     = false;
 	bool                                           ps_front_face                = false;
+	bool                                           ps_front_face_all_bits       = false;
 	bool                                           ps_ancillary                 = false;
 	bool                                           ps_no_perspective            = false;
 	ShaderPixelParameterMode                       parameter_mode = ShaderPixelParameterMode::FirstVertex;