[Emacs-ada-mode] Emacs ada-mode gpr management

[Emmanuel Briot]

A small heads up: we recently did major changes in the API in the various
prj*.ads packages in GNAT, so you will likely need to adapt gnatgpr to the new
API at some point.
There hasn't been any changes in the underlying project format, though, so you
could also decide to keep the old parser (do you support the syntax
   library project Default is
      ...
   end Default;

ie with the qualifier before "project" ?

Our goal is to have a higher level API in the GNAT Components Collection at some
point, likely based on the API that GPS is using. But that is still work in
progress and there is no specific time frame for that

Emmanuel