Add another small test case.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113628 91177308-0d34-0410-b5e6-96231b3b80d8

test/CXX/expr/expr.unary/expr.unary.noexcept/sema.cpp

@@ -12,6 +12,7 @@ void simple() {
   P(sizeof(0));
   P(static_cast<int>(0));
   N(throw 0);
+  N((throw 0, 0));
 }
 
 void nospec();