Fixed ingress timestamp issue in INT

Change-Id: Ib564e0270551a6d117866af8ef501f7ad24875d0
diff --git a/pipelines/fabric/src/main/resources/fabric.p4 b/pipelines/fabric/src/main/resources/fabric.p4
index 610975c..cb287a3 100644
--- a/pipelines/fabric/src/main/resources/fabric.p4
+++ b/pipelines/fabric/src/main/resources/fabric.p4
@@ -46,6 +46,8 @@
     EgressNextControl() egress_next;
 
     apply {
+        fabric_metadata.int_metadata.ingress_tstamp =
+            (bit<32>) standard_metadata.ingress_global_timestamp;
         packet_io_ingress.apply(hdr, fabric_metadata, standard_metadata);
 #ifdef WITH_SPGW
 #ifdef WITH_SPGW_PCC_GATING