Move out gtphub to its own subdir

Change-Id: I707d5e9b775179e732d281ce3d245de83d648eea
diff --git a/doc/examples/osmo-gtphub/gtphub-example.txt b/doc/examples/osmo-gtphub/gtphub-example.txt
index 9c65f92..17f6914 100644
--- a/doc/examples/osmo-gtphub/gtphub-example.txt
+++ b/doc/examples/osmo-gtphub/gtphub-example.txt
@@ -59,7 +59,7 @@
 2. GTPHub:
 
     cd <your-test-dir>
-    path/to/openbsc/openbsc/src/gprs/osmo-gtphub -c gtphub.conf #-e 1 #for DEBUG level
+    path/to/openbsc/openbsc/src/gtphub/osmo-gtphub -c gtphub.conf #-e 1 #for DEBUG level
 
 3. SGSN tests: