support for rlt-1600g-w and rlt-1600x-w in GPON mode

Change-Id: Ib230d3e336043980eb00427384a49cb8bd386bb2
diff --git a/agent/device/rlt-1600x-w/mkdebian/debian/files b/agent/device/rlt-1600x-w/mkdebian/debian/files
new file mode 100644
index 0000000..22c5d8f
--- /dev/null
+++ b/agent/device/rlt-1600x-w/mkdebian/debian/files
@@ -0,0 +1,3 @@
+rlt-1600x-w-dbgsym_3.4.9.8+radisys-V20210420_amd64.deb debug extra
+rlt-1600x-w_3.4.9.8+radisys-V20210420_amd64.buildinfo misc optional
+rlt-1600x-w_3.4.9.8+radisys-V20210420_amd64.deb misc optional