Update OptionalObsoleteFiles.inc after 021385aba562

I forgot to update this file so make delete-old would incorrectly remove
the newly-installed LLVM binutils. While touching the file also update
for 8e1c989abbd1 since ObsoleteFiles.inc now inludes the tablegen binaries.

Reported by: Herbert J. Skuhra <herbert@gojira.at>
Reviewed By: emaste, imp

Differential Revision: https://reviews.freebsd.org/D32022

(cherry picked from commit 88c027338f182e2af56d0dbabd4a94fbca6f091a)