trusty-l4t: set EXCLUDE_FROM_WORLD
trusty-l4t: set EXCLUDE_FROM_WORLD

Building trusty from source (which is optional) requires
additional setup, so don't include it by default in 'world'
builds.

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

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