Add triples to these tests to keep them working on Windows,
where wchar_t is only 16 bits wide.

llvm-svn: 154072
diff --git a/clang/test/SemaCXX/constexpr-printing.cpp b/clang/test/SemaCXX/constexpr-printing.cpp
index fc0cce2..9170fa1 100644
--- a/clang/test/SemaCXX/constexpr-printing.cpp
+++ b/clang/test/SemaCXX/constexpr-printing.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -std=c++11 -fsyntax-only -verify
+// RUN: %clang_cc1 %s -std=c++11 -fsyntax-only -verify -triple x86_64-linux-gnu
 
 struct S;
 constexpr int extract(const S &s);