libstdc++: use extern "C++" in all our C++ system headers.
This is needed to build an independent toolchain with g++ that doesn't think
that all these headers are in C.
Change-Id: Ie9a8ccfcab7780d6a4e5722777d61c2b1b312001
diff --git a/libstdc++/include/cstddef b/libstdc++/include/cstddef
index fc1ca9d..cb06b49 100644
--- a/libstdc++/include/cstddef
+++ b/libstdc++/include/cstddef
@@ -38,9 +38,13 @@
*/
#include <stddef.h>
+extern "C++" {
+
namespace std {
using ::ptrdiff_t;
using ::size_t;
} // namespace std
+} // extern C++
+
#endif // BIONIC_LIBSTDCPP_INCLUDE_CSTDDEF__