Auto merge of #400 - asomers:master, r=posborne
Auto merge of #400 - asomers:master, r=posborne

Update CHANGELOG for pull request 397

xd009642/nix,asomers/nix,kamalmarhubi/nix-rust,geofft/nix-rust,Susurrus/nix,geofft/nix-rust,berkowski/nix,xd009642/nix,kamalmarhubi/nix-rust,posborne/rust-nix,posborne/rust-nix,carllerche/nix-rust,nix-rust/nix,carllerche/nix-rust,carllerche/nix-rust,geofft/nix-rust,berkowski/nix,Susurrus/nix,kamalmarhubi/nix-rust,posborne/rust-nix,xd009642/nix,berkowski/nix,MarkusJais/nix-rust,asomers/nix,nix-rust/nix,Susurrus/nix,MarkusJais/nix-rust,MarkusJais/nix-rust