improve buildRoad - fix regression: roads not build-up in external rooms - build roads on swamps even at low RCL
improve buildRoad
- fix regression: roads not build-up in external rooms
- build roads on swamps even at low RCL

TooAngel/screeps,stu43005/screeps,stu43005/screeps,Nevrdid/screeps,Jirajha/screeps,TooAngel/screeps,Jirajha/screeps,Nevrdid/screeps