mesa: rework stubs packaging
mesa: rework stubs packaging

so the real mesa libraries get included in the rootfs
for use by QEMU during postinstalls that run things
like gtk-query-immodules.

Also make these stubs dependent on the libdrm stubs,
and take advantage of the new 'tegra' override to
eliminate some redundancy.

Signed-off-by: Matt Madison <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@madison.systems>

madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra,madisongh/meta-tegra