poky_stx_aio_ks.cfg: add installer images for pxe
In stx 3.0, these images are downloaded from centos and
packaged in pxe-network-installer, but the images from
centos can not be used directly here, the corresponding
images are built in a separate project for anaconda, and
are not available yet when pxe-network-installer is built,
so we have to move these installation to the post-run
script in the anaconda's kickstart file.
Issue-ID: INF-130
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Change-Id: I282866c2720f3cae9df16f0c49569bc6409c2fbf