build: Add meson build system

Reuse the generated dbus interface .xml files from fprintd to avoid
unnecessary copies.

tests/pam/meson.build

@@ -0,0 +1,26 @@
+subdir('services')
+
+tests = [
+    'test_pam_fprintd',
+]
+
+foreach t: tests
+    test(t,
+        python3,
+        args: meson.current_source_dir() / t + '.py',
+        suite: ['PAM'],
+        depends: [
+            pam_fprintd,
+            pam_service_file,
+        ],
+        env: [
+            'TOPBUILDDIR=' + meson.build_root(),
+            'TOPSRCDIR=' + meson.source_root(),
+            'LD_PRELOAD=libpam_wrapper.so',
+            'PAM_WRAPPER=1',
+            'PAM_WRAPPER_SERVICE_DIR=' + meson.current_build_dir() / 'services',
+            'G_DEBUG=fatal-warnings',
+        ],
+        timeout: 60,
+    )
+endforeach