initial oem feature

This is an experimental and known incomplete support
for the system configuration that has to be done at the
first boot-up by its user since it's their choice.

This draft uses systemd which has been a requirement :-/
Thanks sem@ for helping out with the somewhat tricky
unit file for alterator-setup.

features.in/oem/README

@@ -0,0 +1,2 @@
+Эта фича обеспечивает автоматический запуск предварительной настройки,
+характерный для OEM-образов.

features.in/oem/config.mk

@@ -0,0 +1,5 @@
+use/oem: use/services use/branding
+	@$(call add_feature)
+	@$(call add,DEFAULT_SERVICES_ENABLE,messagebus alteratord setup)
+	@$(call add,THE_PACKAGES,alterator-setup alterator-notes)
+	@$(call add,THE_BRANDING,alterator notes)

features.in/oem/rootfs/image-scripts.d/99-oem-setup

@@ -0,0 +1,12 @@
+#!/bin/sh
+# this breaks the default configuration on intent
+# so that alterator-setup can run predictably
+
+TARGET=/lib/systemd/system/setup.target
+
+[ ! -s "$TARGET" ] ||
+	ln -s "$TARGET" /etc/systemd/system/default.target
+
+echo "LANG=en_US.utf-8" >> /etc/sysconfig/i18n
+
+: