libgcrypt/cross: Fix build for mingw-w64.

Especially for the 64bit mingw target, because libgcrypt contains
protected mode assembly.

Also, this adds gettext to the crossAttrs of libgpg-error, because it
tries to regenerate the MO files.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

pkgs/development/libraries/libgcrypt/1.6.nix

@@ -24,6 +24,12 @@ stdenv.mkDerivation rec {
     make check
   '';
 
+  crossAttrs = let
+    isCross64 = stdenv.cross.config == "x86_64-w64-mingw32";
+  in stdenv.lib.optionalAttrs isCross64 {
+    configureFlags = [ "--disable-asm" "--disable-padlock-support" ];
+  };
+
   meta = {
     description = "GNU Libgcrypt, a general-pupose cryptographic library";