Added vendor/opensource/pf_ring.

Change-Id: I961db67030d106ffc79740689d726e4313019476
diff --git a/default.xml b/default.xml
index a81228a..4059c6a 100644
--- a/default.xml
+++ b/default.xml
@@ -61,6 +61,7 @@
   <project name="vendor/opensource/hdhomerun_plugin"/>
   <project name="vendor/opensource/libjingle"/>
   <project name="vendor/opensource/fallocate"/>
+  <project name="vendor/opensource/pf_ring"/>
   <project name="vendor/opensource/projectM"/>
   <project name="vendor/opensource/tarballs"/>
   <project name="vendor/opensource/toolbox" path="toolbox-for-linux"/>