contrib: gpu-burn: silence _FORTIFY_SOURCE warnings
contrib: gpu-burn: silence _FORTIFY_SOURCE warnings

which crop up when using security_flags.inc, because
the _FORTIFY_SOURCE define is added to compiler flags
that get passed to nvcc, while the optimization flag
does not.

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

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