/dev/urandom entropy source already being passed using QB_RNG [1].

[1] https://git.yoctoproject.org/poky/tree/meta/classes-recipe/qemuboot.bbclass#n101



Signed-off-by: Naveen Saini <naveen.kumar.saini@intel.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>