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.

tools/tests/meson.build

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021 Iñigo Martinez <inigomartinez@gmail.com>
+
+test_conf = {
+  'abs_top_builddir': build_root,
+  'abs_top_srcdir': source_root,
+}
+
+subdir('services')
+
+test_wrapper = configure_file(
+  input: 'test-wrapper.sh.in',
+  output: '@BASENAME@',
+  configuration: test_conf,
+)
+
+# common
+if enable_gir
+  test_unit = 'test-stub'
+
+  exe = executable(
+    test_unit,
+    test_unit + '.c',
+    include_directories: [top_inc, src_inc],
+    dependencies: libmm_glib_dep,
+    c_args: '-DTEST_SERVICES="@0@"'.format(meson.current_build_dir() / 'services'),
+  )
+
+  test(test_unit, exe)
+endif

tools/tests/services/meson.build

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021 Iñigo Martinez <inigomartinez@gmail.com>
+
+configure_file(
+  input: 'org.freedesktop.ModemManager1.service.in',
+  output: '@BASENAME@',
+  configuration: test_conf,
+)