stdlib,configs: Set SPEC examples partition param to optional

The SPEC2006 and SPEC2017 example configs require the passing of SPEC
disk image to function correctly. Prior to this commit a root partition
parameter was required. However, disk images don't necessarily have
partitions. In this case an empty string needed passed.

This patch makes the root partition parameter optional. If a disk image
does not have a root partition, it does not need specified.

Change-Id: Ic0093c70c72ab83ffaca54c8ad24245d84a5e5ba
Reviewed-by: Jason Lowe-Power <>
Maintainer: Jason Lowe-Power <>
Tested-by: kokoro <>
2 files changed