[aat] Clean up ankr table include mess
diff --git a/src/hb-aat-layout-ankr-table.hh b/src/hb-aat-layout-ankr-table.hh
index 5f7656d..b793245 100644
--- a/src/hb-aat-layout-ankr-table.hh
+++ b/src/hb-aat-layout-ankr-table.hh
@@ -36,6 +36,8 @@
 
 namespace AAT {
 
+using namespace OT;
+
 
 struct Anchor
 {