[Suggestion] Show progress of generating godot api bindings
Currently on Windows bindings are not generated very fast (at least for me):
```
nake build
DETECTED MONITORS: 1
Activated GL 3.3 contextOpenGL ES 3.0 Renderer: GeForce GTX 750/PCIe/SSE2
GLES3: max ubo light: 409
GLES3: max ubo reflections: 455, ubo size: 144
ERROR: No loader found for resource: res://godotapi/api.json
   At: core\io\resource_loader.cpp:223
ERROR: Failed loading scene: res://godotapi/api.json
   At: main\main.cpp:1460
WARNING: ObjectDB::cleanup: ObjectDB Instances still exist!
     At: core\object.cpp:2003
```
Someone can think that it freezed, but it didn't (because I see new files created in godotapi folder)

Maybe we can add simple progress?