nilrt.conf: Add free space to created image
nilrt.conf: Add free space to created image

Signed-off-by: Mihai Neagu <b5d60f0fd2ce1ec16952928397920230b6659ff6@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt