move features to build.rs

Author: burrbull

CHANGELOG.md

@@ -16,11 +16,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+ - Move private features to `build.rs` [#710]
  - Use `stm32f4-staging` until `stm32f4` is released [#706]
  - Allow different lengths of buffers in hal_1 SpiBus impl [#566]
 
 [#566]: https://github.com/stm32-rs/stm32f4xx-hal/pull/566
 [#706]: https://github.com/stm32-rs/stm32f4xx-hal/pull/706
+[#710]: https://github.com/stm32-rs/stm32f4xx-hal/pull/710
 [#731]: https://github.com/stm32-rs/stm32f4xx-hal/pull/731
 [#758]: https://github.com/stm32-rs/stm32f4xx-hal/pull/758