[Clas_offline] compile with ROOT on 64

[fxgirod at jlab.org]

Dear Gagik,

> The line that you sent as a compilation line does not have the flag -m64
> in it, which is needed if you're trying to link with a 64 bit ROOT.
> Could you be more specific ?
> Are you trying to compile your code as 64 bit and link with 64 bit ROOT ?

Yes, that's what I'm trying to do. Eventually, it worked using the list
generated by
root-config --libs

Thanks for the prompt answer !

Best regards,
Francois