gitstatus: fix darwin build

On darwin with sandbox disabled the system-wide zsvenv will get sourced
first and will fail the installCheckPhase with
"zsh compinit: insecure directories, run compaudit for list."

By using `-d` this will be prevented.

Signed-off-by: Florian Brandes <florian.brandes@posteo.de>

pkgs/by-name/gi/gitstatus/package.nix

@@ -111,7 +111,7 @@ stdenv.mkDerivation rec {
     # run zsh as a full-fledged independent process and then wait for it to
     # exit. (The "exit" statements in the zshrc ensure that zsh will exit
     # almost immediately after starting.)
-    ZDOTDIR=. zsh -i &
+    ZDOTDIR=. zsh -d -i &
     wait $!
   '';