auto/config: Install pi-bluetooth for raspi images

These are in restricted, and so cannot be depended on by the
metapackages which are in main.

live-build/auto/config

@@ -947,7 +947,7 @@ case $ARCH in
 			raspi)
 				# Generic Raspberry Pi images
 				COMPONENTS='main restricted universe multiverse'
-				add_package install linux-firmware-raspi2 u-boot-rpi flash-kernel u-boot-tools wpasupplicant
+				add_package install linux-firmware-raspi2 pi-bluetooth u-boot-rpi flash-kernel u-boot-tools wpasupplicant
 				BINARY_REMOVE_LINUX=false
 				;;
 			imx6)