gomemif: migrate to govpp repository

Type: make
Signed-off-by: Matus Halaj <mhalaj@cisco.com>
Change-Id: I1d48c7e44fdf23438132996fd3288b29da1fe36e
diff --git a/extras/gomemif/migrated.txt b/extras/gomemif/migrated.txt
new file mode 100644
index 0000000..abe913a
--- /dev/null
+++ b/extras/gomemif/migrated.txt
@@ -0,0 +1 @@
+Gomemif has been migrated to GoVPP repository https://github.com/FDio/govpp
\ No newline at end of file