Fix link to RFC 1510
None
[RFC 1513](https://github.com/rust-lang/rfcs/blob/master/text/1513-less-unwinding.md).
* [Add a new crate type, 'cdylib'](https://github.com/rust-lang/rust/pull/33553).
cdylibs are dynamic libraries suitable for loading by non-Rust hosts.
- [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-rdylib.md).
+ [RFC 1510](https://github.com/rust-lang/rfcs/blob/master/text/1510-cdylib.md).
Note that Cargo does not yet directly support cdylibs.
Stabilized APIs