[Gmsh] transfer physical groups to patches in version 4.3.0

[Marc Belleau]

Hi to all

I have to use version 2.12.0 in order for gmshToFoam to transform the  
physical groups into patches. Because if I use version 4.3.0 and save  
the mesh in ascii version 2 format including all elements, gmshToFoam  
ignores the physical groups and you end up with a single huge patch by  
the name of patch0.

So I wonder if this is a bug. If so, it is really disppointing since I  
would much prefer to use the latest gmsh version.

Thanks anyhow