[committed] libstdc++: Add missing target selector to std::expected test

[Jonathan Wakely via Gcc-patches]

Tested x86_64-linux. Pushed to trunk.

-- >8 --

This test should use a target selector of c++23 so that the explicit
-std=gnu++23 option can be removed, to allow testing with later
standards too.

libstdc++-v3/ChangeLog:

        * testsuite/20_util/expected/bad.cc: Add missing target
        selector.
---
 libstdc++-v3/testsuite/20_util/expected/bad.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/testsuite/20_util/expected/bad.cc 
b/libstdc++-v3/testsuite/20_util/expected/bad.cc
index 17bc6d69e88..e5d7ba4afb0 100644
--- a/libstdc++-v3/testsuite/20_util/expected/bad.cc
+++ b/libstdc++-v3/testsuite/20_util/expected/bad.cc
@@ -1,5 +1,5 @@
 // { dg-options "-std=gnu++23" }
-// { dg-do compile }
+// { dg-do compile { target c++23 } }
 
 #include <expected>
 
-- 
2.41.0