Otherwise the absolute path to our test binary is invalid
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
configuration : udev_rules_config)
litest_udev_rules_config = configuration_data()
-litest_udev_rules_config.set('UDEV_TEST_PATH', meson.build_root())
+litest_udev_rules_config.set('UDEV_TEST_PATH', meson.build_root() + '/')
litest_groups_rules_file = configure_file(input : 'udev/80-libinput-device-groups.rules.in',
output : '80-libinput-device-groups-litest.rules',
install : false,