math/ess: Fix build after latest editors/emacs-devel update

The 'when' argument of make-obsolete and related functions was recently
made mandatory. [1] Apply an upstream patch to a
`define-obsolete-function-alias' call to fix the build. [2]

[1] https://github.com/emacs-mirror/emacs/commit/32c6732d16385f242b1109517f25e9aefd6caa5c
[2] https://github.com/emacs-ess/ESS/commit/9cc5520e1998d03f5dec0fbb1fe71b7cdec38b65

Reported by: tcberner
Approved by: rhurlin (maintainer)
Differential Revision: https://reviews.freebsd.org/D28285