[oe] [meta-oe][PATCH] terminus-font: add new recipe for version 4.38

[Khem Raj]

On Thu, Mar 20, 2014 at 4:11 AM, Matthieu Crapet
<Matthieu.Crapet at ingenico.com> wrote:
> +PACKAGECONFIG ??= "${@base_contains('DISTRO_FEATURES', 'x11', 'x11', '', d)}"

why use ??= and not ?= here