l4t_deb_pkgfeed.bbclass: restrict EXTRANATIVEPATH addition
l4t_deb_pkgfeed.bbclass: restrict EXTRANATIVEPATH addition

to just the do_unpack task.

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

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