Map host /dev/urandom to the /dev/random of stx-lat-tool container
as the entropy seed. Make sure there is enough entropy seeds when
we build the iso image, so that we can avoid the failure of during
building image.
Story: 2008862
Task: 44383
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Change-Id: Idbeb764965c37f8cc33f5904c3ffecccd2b799ca
17d69346ac