Add system/libufdt

Bug: 30800619
Change-Id: I455248e2ea3fc35769a9ba9f3d60ac45860e44f5

default.xml

@@ -525,6 +525,7 @@
   <project path="system/keymaster" name="platform/system/keymaster" groups="pdk" />
   <project path="system/libhidl" name="platform/system/libhidl" />
   <project path="system/libhwbinder" name="platform/system/libhwbinder" groups="pdk" />
+  <project path="system/libufdt" name="platform/system/libufdt" groups="pdk" />
   <project path="system/libvintf" name="platform/system/libvintf" />
   <project path="system/media" name="platform/system/media" groups="pdk" />
   <project path="system/nativepower" name="platform/system/nativepower" />