Update copyright notice.

Update copyright notice.
(ada-xref-create-ali): The default is now not to create automatically the
ALI files by compiling the unit, since this isn't always reliable and
requires an up-to-date project file.
(ada-prj-default-comp-cmd): No longer use gcc directly to compile
a file, but use gnatmake instead, since this gives access to the GNAT
project files.
(ada-xref-search-with-egrep): New variable, suggested by P. Waroquiers.
(ada-load-project-hook): New variable, for support of GNAT project files.
(ada-update-project-menu): Fix the detection of the project file name.
(ada-add-keymap): Change key binding for ada-find-file, that conflicted
with another binding in ada-mode.el.
(ada-add-menu): New menu "List Local References", to list the reference
to the entity only in the current file, instead of looking in the whole
project.  Much faster.
(ada-find-references): New parameters arg and local-only.
(ada-find-any-references): New parameters local-only and append.
(ada-goto-declaration): Fix handling of predefined entities in xref.
(ada-get-all-references): Updated to the new xref format in GNAT 3.15,
still compatible with GNAT 3.14 of course.  Fix various calls to
count-lines, that didn't work correctly when the buffer was narrowed.