graphics/epsonscan2-non-free-plugin: Update 6.6.40.0 => 6.7.70.0
Old version crashes on 15.0-CURRENT amd64.
Add support for linux=rl9.
PR: 284127
Approved by: J.R. Oldroyd <fbsd@opal.com>
Tested by: rhurlin
MFH: 2025Q1
(cherry picked from commit 08c9e16ac5ea8feccd2a00cec6e2737dca1ebe45)