Revision 471190

editors/emacs: Update to version 26.1

NEWS: https://www.gnu.org/software/emacs/news/NEWS.26.1

Port changes
- Incorporate latest canna patches submitted by
  TAKANO Yuji <takachan@running-dog.net>.
- Remove workarounds for Bug 227799.
  - Configure succeeds whether devel/liblockfile is installed or not.
- Customize COMMENT for canna and nox flavors (reported by tobik).
- Remove legacy lldb for gud patch.
  - The patch added very little over running lldb on the command line.
    Moreover, gud is deprecated.  Hopefully a lldb-mi will arrive soon.

Reviewed by:	ashish (maintainer)
Differential Revision:	https://reviews.freebsd.org/D15044