Sort the type traits in a few places where they weren't previously
sorted in order to prepare for adding some new ones.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130056 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index cf852f8..1a3290a 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -983,14 +983,14 @@
     return move(Result);
   }
 
-  case tok::kw___is_pod: // [GNU] unary-type-trait
+  case tok::kw___is_abstract: // [GNU] unary-type-trait
   case tok::kw___is_class:
-  case tok::kw___is_enum:
-  case tok::kw___is_union:
   case tok::kw___is_empty:
-  case tok::kw___is_polymorphic:
-  case tok::kw___is_abstract:
+  case tok::kw___is_enum:
   case tok::kw___is_literal:
+  case tok::kw___is_pod:
+  case tok::kw___is_polymorphic:
+  case tok::kw___is_union:
   case tok::kw___has_trivial_constructor:
   case tok::kw___has_trivial_copy:
   case tok::kw___has_trivial_assign: