Ubuntu 18 is still a supported distro for Kirkstone, but a recent update
of orc is failing the native build, because it requires a GCC version
newer than the default included in ubuntu 18.
This commit backports a fix which is part of upstream orc 0.4.40.
Signed-off-by: Javier Viguera <javier.viguera@digi.com>
bee97587cb