conf/board: Install librem5-devkit specific base package

conf/board

@@ -85,6 +85,9 @@ case ${pureos_board} in
                         --no-kernel
                         --arch="${arch}"
                        )
+    board_packages="
+        librem-devkit-base
+    "
     ;;
   qemu-x86_64)
     board_type=x86