don't orient boundary layer mesh

Mesh/meshGFace.cpp

@@ -1797,6 +1797,7 @@ void orientMeshGFace::operator()(GFace *gf)
   if(gf->geomType() == GEntity::DiscreteSurface) return;
   if(gf->geomType() == GEntity::ProjectionFace) return;
   if(gf->geomType() == GEntity::CompoundSurface) return;
+  if(gf->geomType() == GEntity::BoundaryLayerSurface) return;
 
   if(!gf->getNumMeshElements()) return;