Add harfbuzz_ng

Change-Id: I435faa2ceabe363f9cd3394d631a0d37c1f9bfb1
diff --git a/default.xml b/default.xml
index 187fb66..8f9078e 100644
--- a/default.xml
+++ b/default.xml
@@ -96,6 +96,7 @@
   <project path="external/guava" name="platform/external/guava" />
   <project path="external/hamcrest" name="platform/external/hamcrest" />
   <project path="external/harfbuzz" name="platform/external/harfbuzz" />
+  <project path="external/harfbuzz_ng" name="platform/external/harfbuzz_ng" />
   <project path="external/hyphenation" name="platform/external/hyphenation" />
   <project path="external/icu4c" name="platform/external/icu4c" />
   <project path="external/iproute2" name="platform/external/iproute2" />