Add back attribute string lookup for 'ns_returns_retained' and
'cf_returns_retained'.

llvm-svn: 71311
diff --git a/clang/lib/Parse/AttributeList.cpp b/clang/lib/Parse/AttributeList.cpp
index c5ec961..c9d32ec 100644
--- a/clang/lib/Parse/AttributeList.cpp
+++ b/clang/lib/Parse/AttributeList.cpp
@@ -133,6 +133,10 @@
   case 18:
     if (!memcmp(Str, "warn_unused_result", 18)) return AT_warn_unused_result;
     break;
+  case 19:
+    if (!memcmp(Str, "ns_returns_retained", 19)) return AT_ns_returns_retained;
+    if (!memcmp(Str, "cf_returns_retained", 19)) return AT_cf_returns_retained;
+    break;            
   case 22:
     if (!memcmp(Str, "no_instrument_function", 22))
       return AT_no_instrument_function;