exynos: hwc: Fix usage of GRALLOC_USAGE_PRIVATE_NONSECURE

Change-Id: I30d685b73dd8bd8dd327514b636f8db3e7a890df
exynos5-insignal: libscaler: Add kernel include dir

Change-Id: Ifb056b52f51262e5f1334eba2d72718a86088e53