Update Rakefile to exclude jcon.h from diff check
Update Rakefile to exclude jcon.h from diff check

joncol/jcon,zeromem88/jcon-cpp,joncol/jcon,zeromem88/jcon-cpp,joncol/jcon-cpp,zeromem88/jcon-cpp,joncol/jcon-cpp,joncol/jcon,joncol/jcon-cpp