Native bluetooth support (#91)

* Add bluez

* rpi firmware

* add rpi support

* Make packages from rpi

* Fix build

* Fix target

* persistent

* fix package

* Auto enable

* Fix parameter

* Fix rpi

* Fix done

buildroot-external/rootfs-overlay/usr/lib/systemd/system/hassos-hardware.target

@@ -0,0 +1,3 @@
+[Unit]
+Description=HassOS hardware targets
+Documentation=man:systemd.target(5)

buildroot-external/rootfs-overlay/usr/lib/systemd/system/var-lib-bluetooth.mount

@@ -0,0 +1,14 @@
+[Unit]
+Description=Bluetooth persistent state
+Requires=mnt-overlay.mount
+After=mnt-overlay.mount
+Before=bluetooth.service
+
+[Mount]
+What=/mnt/overlay/var/lib/bluetooth
+Where=/var/lib/bluetooth
+Type=None
+Options=bind
+
+[Install]
+WantedBy=hassos-bind.target