re-enabled darwin patch, gcc-darwin does not support -arch flag

svn path=/nixpkgs/trunk/; revision=21412

pkgs/development/libraries/openssl/default.nix

@@ -6,7 +6,7 @@ let
     stdenv.cross;
 in
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation ( rec {
   name = "openssl-0.9.8n";
   
   src = fetchurl {
@@ -14,9 +14,6 @@ stdenv.mkDerivation rec {
     sha256 = "008z1h09pa6dfxs4wgbqj5i1clw4v82b1waqvwanb1kb6wlbq6mh";
   };
 
-  # I disable the patch temporarily, as it does not apply to 0.9.8n
-  # patches = [ ./darwin-arch.patch ];
-  
   buildNativeInputs = [ perl ];
 
   configureScript = "./config";
@@ -39,4 +36,4 @@ stdenv.mkDerivation rec {
     homepage = http://www.openssl.org/;
     description = "A cryptographic library that implements the SSL and TLS protocols";
   };
-}
+} // (if stdenv.isDarwin then { patches = [./darwin-arch.patch]; } else {}) )