fixed a small problem in the build ubuntu script for bullet
fixed a small problem in the build ubuntu script for bullet

AlphaStaxLLC/tundra,jesterKing/naali,realXtend/tundra,jesterKing/naali,BogusCurry/tundra,realXtend/tundra,AlphaStaxLLC/tundra,realXtend/tundra,AlphaStaxLLC/tundra,jesterKing/naali,jesterKing/naali,pharos3d/tundra,pharos3d/tundra,jesterKing/naali,BogusCurry/tundra,pharos3d/tundra,pharos3d/tundra,realXtend/tundra,AlphaStaxLLC/tundra,realXtend/tundra,AlphaStaxLLC/tundra,realXtend/tundra,jesterKing/naali,jesterKing/naali,BogusCurry/tundra,pharos3d/tundra,BogusCurry/tundra,BogusCurry/tundra,BogusCurry/tundra,pharos3d/tundra,AlphaStaxLLC/tundra