[Pkg-emacsen-addons] Bug#944249: gnuplot-mode does not work with emacs26

[Dima Kogan]

Thanks for the patches, Agustin. I just tried it out. Works for the most
part. One thing that doesn't work for me is (gnuplot-mode) being
executed when opening a .gp file. You added this to the package, and the
dh-elpa machinery is creating the appropriate file:

  /etc/emacs/site-start.d/50elpa-gnuplot-mode.el

I don't think this is being evaluated, however. Is it working for you?
Do you know at which point in the emacs startup sequence this is
sourced? Is it always supposed to be sourced? What about 'emacs -q'? Or
'emacs -Q'?

Thanks