nixpkgs: compcert 2.6 -> 2.7.1

Signed-off-by: Austin Seipp <aseipp@pobox.com>

pkgs/development/compilers/compcert/default.nix

@@ -4,11 +4,11 @@
 
 stdenv.mkDerivation rec {
   name    = "compcert-${version}";
-  version = "2.6";
+  version = "2.7.1";
 
   src = fetchurl {
     url    = "http://compcert.inria.fr/release/${name}.tgz";
-    sha256 = "05sdxgg2w7ykw6xbcq6dl2kzxdz4qzhjajiawpy6490wqiji7wm1";
+    sha256 = "1vhbs1fmr9x2imqyd6yfvkbz763jhjfm9wk4nizf9rn1cvxrjqa4";
   };
 
   buildInputs = [ coq ] ++ (with ocamlPackages; [ ocaml findlib menhir ]);

pkgs/top-level/all-packages.nix

@@ -4393,6 +4393,7 @@ in
     else {}
   ) // {
     ocamlPackages = ocamlPackages_4_02;
+    coq = coq_8_5;
   });
 
   cryptol = self.haskell.packages.lts.cryptol;