Add support for the __has_trivial_destructor type trait.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69345 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ExprCXX.cpp b/lib/AST/ExprCXX.cpp
index 3634c20..d73ea37 100644
--- a/lib/AST/ExprCXX.cpp
+++ b/lib/AST/ExprCXX.cpp
@@ -173,7 +173,11 @@
   case UTT_HasTrivialConstructor:
     if (const RecordType *RT = QueriedType->getAsRecordType())
       return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialConstructor();
-   return false;
+    return false;
+  case UTT_HasTrivialDestructor:
+    if (const RecordType *RT = QueriedType->getAsRecordType())
+      return cast<CXXRecordDecl>(RT->getDecl())->hasTrivialDestructor();
+    return false;
   }
 }