MFH: r418312

bsd.emacs.mk: Fix EMACS_VER for emacs-devel after r416838.

The value did not match the one in editors/emacs-devel, so ports such as
textproc/markdown-mode.el would fail make build/run-depends since the wrong
binary name would be looked for.

Approved by: ports-secteam (junovitch)