Petitboot v1.2.5 released

[Samuel Mendoza-Jonas]

Petitboot v1.2.5 has been released, which includes the below commits
cherry-picked from master.
These fix an issue where a segfault could occur when pb-discover
received several nlmsg interface name updates out of conventional order
and relied on the interface names being unique.

- discover/network: Add find_interface_by_uuid
- discover: Pass UUID to discover_device_create()
- utils: Always pass MAC address in pb-udhcpc
- discover: Deprecate 'conf' user event