[libstdc++ PATCH] Add support for std::uncaught_exceptions

[Jonathan Wakely]

On 15/04/15 14:10 -0300, Daniel Gutson wrote:
>You might want to check this thread
>https://gcc.gnu.org/ml/libstdc++/2015-04/msg00104.html
>which is specially useful when creating multilibs with and without exceptions
>and enabling linker's sections garbage collection.
>Maybe you could commit the change for both uncaught_exception and
>uncaught_exceptions?

I'll be doing both commits.