Add a CXXExceptions flag to LangOptions.

llvm-svn: 126299
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 8fcb535..b1edf95 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -1023,8 +1023,9 @@
   Record.push_back(LangOpts.LaxVectorConversions);
   Record.push_back(LangOpts.AltiVec);
   Record.push_back(LangOpts.Exceptions);  // Support exception handling.
-  Record.push_back(LangOpts.SjLjExceptions);
   Record.push_back(LangOpts.ObjCExceptions);
+  Record.push_back(LangOpts.CXXExceptions);
+  Record.push_back(LangOpts.SjLjExceptions);
 
   Record.push_back(LangOpts.MSBitfields); // MS-compatible structure layout
   Record.push_back(LangOpts.NeXTRuntime); // Use NeXT runtime.