updated rootfs_overlay for orangepi_pc

board/orangepi_pc/rootfs_overlay/etc/group

@@ -0,0 +1,17 @@
+root:x:0:root
+tty:x:5:
+disk:x:6:root
+kmem:x:9:
+floppy:x:11:root
+audio:x:18:
+cdrom:x:19:
+dialout:x:20:root
+input:x:23:
+tape:x:26:root
+video:x:27:root
+netdev:x:28:
+dnsmasq:x:963:dnsmasq
+sshd:x:33:sshd
+kvm:x:34:kvm
+nobody:x:65534:
+gitea:x:1000: