samba: Update bupstash to 0.12.0.

Change-Id: I90bde7093ffdb5a1567d55725b0ce497fa010073
diff --git a/samba/bupstash.nix b/samba/bupstash.nix
index 1446c70..9ab2e1b 100644
--- a/samba/bupstash.nix
+++ b/samba/bupstash.nix
@@ -2,16 +2,16 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "bupstash";
-  version = "0.10.2";
+  version = "0.12.0";
 
   src = fetchFromGitHub {
     owner = "andrewchambers";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-0PKQYvKmAGP4/15nKhB+aZh8PF9dtDFjXEuPCA5tDYk=";
+    sha256 = "sha256-Ekjxna3u+71s1q7jjXp7PxYUQIfbp2E+jAqKGuszU6g" /*lib.fakeSha256*/;
   };
 
-  cargoSha256 = "sha256-6zVWKVtTL6zbB4Uulq+sK4vm3qAC0B5kf0DmDv5aneo=";
+  cargoSha256 = "sha256-hkGmE7WseEjMxmmPyR8C4osbdbpIt8qG9sfVGuC4d84" /*lib.fakeSha256*/;
 
   nativeBuildInputs = [ ronn pkg-config installShellFiles ];
   buildInputs = [ libsodium ];