GPU: GLSL preprocess: Remove invalidly processed header

Add assert in the preprocessor that these file don't get
processed.

source/blender/draw/CMakeLists.txt

@@ -605,7 +605,6 @@ set(GLSL_SRC
   intern/shaders/draw_command_generate_comp.glsl
   intern/shaders/draw_debug_draw_display_frag.glsl
   intern/shaders/draw_debug_draw_display_vert.glsl
-  intern/shaders/draw_debug_info.hh
   intern/shaders/draw_debug_print_display_frag.glsl
   intern/shaders/draw_debug_print_display_vert.glsl
   intern/shaders/draw_intersect_lib.glsl

source/blender/gpu/glsl_preprocess/glsl_preprocess.cc

@@ -58,6 +58,14 @@ int main(int argc, char **argv)
         error++;
       };
 
+  const bool is_info = std::string(output_file_name).find("info.hh") != std::string::npos;
+
+  if (is_info) {
+    std::cerr << "File " << output_file_name
+              << " is a create info file and should not be processed as glsl" << std::endl;
+    return 1;
+  }
+
   blender::gpu::shader::Preprocessor processor;
 
   output_file << processor.process(buffer.str(), report_error);