Source /etc/default/urandom if present. This allows the rootfs to
remain read-only while enabling the user to override the location of the
random seed file.
(From OE-Core rev: 415e1a4ac8120b28118671698459b098c965a4f6)
Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Signed-off-by: Ben Shelton <ben.shelton@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>