Setting BUILD_DATE overrides the date used in the generated image names.
With this it is possible to have a consistent build date across all
architectures, making it easier to identify a release. Furthre more it
might be the key to have reproducible builds

gluon-web-mesh-vpn-fastd allows the user to switch between the security and performance VPN settions.

remove ibss

remove ibss mesh

Setting GLUON_ATH10K_MESH to ibss will enable generation of images for ath10k devices and install the firmware for the corresponding WLAN mode