Hi,
That append just does:
PACKAGECONFIG_append_vexpressa9 = " gles egl"
But 8.0.5 (and actually some of the 8.0.4 releases) have:
PACKAGECONFIG ??= "${@base_contains('DISTRO_FEATURES', 'x11', 'x11',
'', d)} egl gles"
So you can drop the bbappend entirely on your master branch.
Ross