[Rivet] plugindemo Makefile

[Hendrik Hoeth]

Hi Frank,

in r2274 you added trunk/plugindemo/Makefile to the repository, but
configure will overwrite that file. Was this intended?

Cheers,

   Hendrik

-- 
"Two equal numbers are equivalent, even if they come from two
 different people one of which you don't like"
(MLM about the theoretical top cross-section, in a meeting
about theoretical uncertainties on the top mass)