Added more previous builds

I have added four more build logs of some previous builds. I will be adding some more logs of my previous builds later this week.

1/48 KI-43-II Hayabusa (Oscar)

1/48 MIG-29A Fulcrum A (Polish Air Force)

1/48 Bell UH-1D Iroquois Helicopter

1/48 PZL-37B tOS Polish Bomber