Getting ready to land native-compilation on master

[Eli Zaretskii]

AFAICT, we are quite ready to land this important feature.  The branch
was tested on several systems and is in good shape: many issues and
bugs were fixed, and currently no known issues remain that block the
merge.  (There's a lot yet to do wrt documenting the feature and its
various aspects, but that can be done on master after merging.)

If some of you have some unusual or rare or exotic system or Emacs
configuration, and did not yet try building the native-comp branch,
this is your chance to have a go before the merge: please build the
branch and report any issues or problems you bump into.

If no significant issues pop up within a week, I will ask Andrea to
merge the branch onto master the next weekend (i.e. around 17th of
April).

Last, but not least: I'd like to take this opportunity to thank Andrea
for his hard work and perseverance during this last year.  We would
not be where we are now with this feature without his devotion and
determination to see this through.  Thanks a lot!