Define and implement CXXNoexceptExpr. Create it in Sema.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113623 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CXCursor.cpp b/tools/libclang/CXCursor.cpp
index 6e5f61f..e8c14d2 100644
--- a/tools/libclang/CXCursor.cpp
+++ b/tools/libclang/CXCursor.cpp
@@ -145,6 +145,7 @@
   case Stmt::CXXUnresolvedConstructExprClass:
   case Stmt::CXXDependentScopeMemberExprClass:
   case Stmt::UnresolvedMemberExprClass:   
+  case Stmt::CXXNoexceptExprClass:
   case Stmt::ObjCStringLiteralClass:    
   case Stmt::ObjCEncodeExprClass:       
   case Stmt::ObjCSelectorExprClass: