[all] Move usergroupgen to helpers
[all] Build conf.files in tmp/
[all] Move helper scripts to helpers/ too
[all] move configs to configs/ dir
[all] Remove device specific configs
[all] Set dhd_path for all in-package scripts and files to be copied
[all] Some config is from %{dhd_path}, others is from HA

Signed-off-by: David Greaves <david.greaves@jolla.com>
[all] patterns live in both rpm and common space
[all] Include various updater scripts in the enable_kernel_update option
[all] Introduce makefstab_skip_entries: Allow entries into the makefstab unit creation to be skipped
[all] Introduce rpm_device and rpm_vendor to properly name the adaptation

Signed-off-by: David Greaves <david.greaves@jolla.com>