Readded ng-xos-lib (Still used by XOS)

Change-Id: Ib4c52609f0b4218b8eb1aac7259511b8fbb31703
diff --git a/default.xml b/default.xml
index ed6fafa..0210c43 100644
--- a/default.xml
+++ b/default.xml
@@ -40,6 +40,7 @@
 
 <project path="orchestration/xos-gui" name="xos-gui" groups="orchestration"/>
 <project path="orchestration/xos-rest-gw" name="xos-rest-gw" groups="orchestration"/>
+<project path="orchestration/xos_libraries/ng-xos-lib" name="ng-xos-lib" groups="orchestration,libraries"/>
 
 <project path="incubator/voltha" name="voltha" groups="incubation"/>