r13-3036 moved #include <coroutine> into the new freestanding section, but
also moved it from a C++20 section to a C++23 section. This patch moves it
back.
Incidentally, I'm curious why a few headers were removed from the hosted
section (including <coroutine>), but most were left in place, so we have
redundant includes of most hosted headers.
libstdc++-v3/ChangeLog:
* include/precompiled/stdc++.h: <coroutine> is C++20.
#include <span>
#include <source_location>
#include <version>
+#if __cpp_impl_coroutine
+# include <coroutine>
+#endif
#endif
#if __cplusplus > 202002L
#include <expected>
#include <stdatomic.h>
-#if __cpp_impl_coroutine
-# include <coroutine>
-#endif
#endif
#if _GLIBCXX_HOSTED