ONOS-6563 ONOS-6866 Draft porting of old ECMP P4 demo application

Also, pipeconf implementation for ecmp.p4

Change-Id: Ia8973b42ae386482e341c2b201ad887ad471091e
diff --git a/apps/pi-demo/common/BUCK b/apps/pi-demo/common/BUCK
new file mode 100644
index 0000000..132086c
--- /dev/null
+++ b/apps/pi-demo/common/BUCK
@@ -0,0 +1,7 @@
+COMPILE_DEPS = [
+    '//lib:CORE_DEPS',
+]
+
+osgi_jar (
+    deps = COMPILE_DEPS,
+)
\ No newline at end of file