make streaming routines for widest_int non-static

[Richard Biener]

On Fri, 5 Aug 2016, Prathamesh Kulkarni wrote:

> Hi,
> This patch makes streamer_read_wi and streamer_write_wi non-static,
> and exports them from lto-streamer.h. I suppose this hunk could be committed
> independently of the ipa-bitwise-cp patch ?
> Bootstrap+test in progress on x86_64-unknown-linux-gnu.
> OK for trunk ?

I think I approved a better patch from Kugan.

Richard.