bug#35640: Make USB modems just work on Guix

[pelzflorian (Florian Pelz)]

Find attached patches taking into account your suggestions.  (The
second patch is unchanged.)

On Wed, Jun 12, 2019 at 11:11:16PM +0200, Ludovic Courtès wrote:
> > +                  ;; wrap-program needs bash in PATH:
> > +                  (putenv (string-append "PATH=" #$bash "/bin"))
> 
> Why do you think so?  ‘wrap-program’ does not read $PATH, AFAICS.
> 

wrap-program uses (which "bash").  Without bash in the path, it
generates a wrong shebang “#!#f”.

Regards,
Florian