debian/control: Mark the -doc package with Build-Profiles: <!nodoc> and move gtk-doc-tools to the B-D-I

* New upstream release
  - Switch to meson (Closes: #830015)
  - Adjust the build-dependencies

Update to upstream version '1.90.1'
with Debian dir 17d0335d5de1369f603caa30114a9ae779907e48

And avoid treating "libdir" as an absolute path, the documentation
clearly states that it is "relative to the prefix".

Based on patch by Timothy Gu <timothygu99@gmail.com>

This improves readability of additions and removals.

Include the wayland ci-templates to be able to easily generate an image

Use libfprint templates in order to get its dependencies without having to
manually keep a list of them in sync

Closes: #44

This reverts commit 526b2e8c.

Commit 0994cc31 was enough to implement the coverage support.

Now that it won't clash with the autotools version.

It's empty and was only there to satisfy the autotools.

It was an autotools file, and doesn't contain useful information
anymore.

When coverage is enabled, we need to expose the __gcov_* symbols in the
binaries and libraries or we won't get any coverage report for them.

When coverage is enabled fprintd test won't generate any .gcda file and so
apparently no data, this happens because gcov doesn't handle properly the
process termination when SIGTERM is used, and so when in fprintd.py we
terminate the process no coverage data is reported.

To avoid this, quit the main loop cleanly on SIGTERM, so that we will exit
from the main function cleanly, making libc to perform a gcov flush when we
exit the program.

utils/verify.c:191:12: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
191 |   username = "";
    |            ^

usernames was not freed on exit.

Given that finger_name is set by GOptionEntry, make sure it's always
using allocated memory.

../utils/enroll.c:38:28: error: initialization discards ‘const’ qualifier
  from pointer target type [-Werror=discarded-qualifiers]
38 | static char *finger_name = "right-index-finger";
   |                            ^~~~~~~~~~~~~~~~~~~~

Now that we've fixed our own errors.

There's no need to declare it as extern in the header as it is already
declared in the source files where it's used.

Fixes:
../src/device.c:51:25: error: redundant redeclaration of ‘fprintd_dbus_conn’ [-Werror=redundant-decls]
  51 | extern DBusGConnection *fprintd_dbus_conn;
     |                         ^~~~~~~~~~~~~~~~~
In file included from ../src/device.c:34:
../src/fprintd.h:29:25: note: previous declaration of ‘fprintd_dbus_conn’ was here
  29 | extern DBusGConnection *fprintd_dbus_conn;
     |                         ^~~~~~~~~~~~~~~~~

../src/file_storage.c:47:20: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
47 | static const char *get_storage_path()
   |                    ^~~~~~~~~~~~~~~~
../src/file_storage.c: In function ‘get_storage_path’:
../src/file_storage.c:47:20: warning: old-style function definition [-Wold-style-definition]
../src/file_storage.c: In function ‘file_storage_discover_users’:
../src/file_storage.c:270:9: warning: old-style function definition [-Wold-style-definition]
270 | GSList *file_storage_discover_users()
    |         ^~~~~~~~~~~~~~~~

With the stronger warnings enabled when building with meson, we get a
warning for all the fingers definitions:

  ../src/device.c:38:24: warning: initialization discards ‘const’ qualifier
  from pointer target type [-Wdiscarded-qualifiers]
    38 |  [FP_FINGER_UNKNOWN] = "unknown",

As the `fingers` array name was shadowed in another file:

  ../src/device.c:1000:11: warning: declaration of ‘fingers’ shadows a
  global declaration [-Wshadow]
    1000 |   GSList *fingers, *finger;

Use a bash script to check the translations as we used to do during
the autotools-based distcheck.

Recent versions of gettext can merge translations in xml files,
so use it and remove the intltool dependency for meson builds.