build: Port to meson

meson is a build system focused on speed an ease of use, which
helps speeding up the software development. This patch adds meson
support along autotools.

cli/meson.build

@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021 Iñigo Martinez <inigomartinez@gmail.com>
+
+sources = files(
+  'mmcli-bearer.c',
+  'mmcli.c',
+  'mmcli-call.c',
+  'mmcli-common.c',
+  'mmcli-manager.c',
+  'mmcli-modem-3gpp.c',
+  'mmcli-modem-3gpp-profile-manager.c',
+  'mmcli-modem-3gpp-ussd.c',
+  'mmcli-modem.c',
+  'mmcli-modem-cdma.c',
+  'mmcli-modem-firmware.c',
+  'mmcli-modem-location.c',
+  'mmcli-modem-messaging.c',
+  'mmcli-modem-oma.c',
+  'mmcli-modem-signal.c',
+  'mmcli-modem-simple.c',
+  'mmcli-modem-time.c',
+  'mmcli-modem-voice.c',
+  'mmcli-output.c',
+  'mmcli-sim.c',
+  'mmcli-sms.c',
+)
+
+deps = [
+  gudev_dep,
+  libmm_glib_dep,
+]
+
+executable(
+  'mmcli',
+  sources: sources,
+  include_directories: top_inc,
+  dependencies: deps,
+  install: true,
+)
+
+if enable_bash_completion
+  install_data(
+    'mmcli-completion',
+    install_dir: bash_completion_completionsdir,
+    rename: 'mmcli',
+  )
+endif