cctools: fixup gnu-config detection

Use autoreconfHook instead of preConfigure autogen.sh. This avoids
getting the bad version of the gnu-config script and makes the newish
iOS triples work.

pkgs/os-specific/darwin/cctools/port.nix

@@ -30,12 +30,7 @@ let
 
     outputs = [ "out" "dev" ];
 
-    nativeBuildInputs = [ autoconf automake ]
-
-      # TODO: remove on next hash change, libtool is unnecessary with autoreconfHook
-      ++ stdenv.lib.optional (stdenv.targetPlatform == stdenv.hostPlatform) libtool
-
-      ++ [ autoreconfHook ];
+    nativeBuildInputs = [ autoconf automake libtool autoreconfHook ];
     buildInputs = [ libuuid ]
       ++ stdenv.lib.optionals stdenv.isDarwin [ libcxxabi libobjc ]
       ++ stdenv.lib.optional enableTapiSupport libtapi;
@@ -89,12 +84,6 @@ let
       cd cctools
     '';
 
-    # TODO: this builds an ld without support for LLVM's LTO. We need to teach it, but that's rather
-    # hairy to handle during bootstrap. Perhaps it could be optional?
-    preConfigure = ''
-      sh autogen.sh
-    '';
-
     preInstall = ''
       pushd include
       make DSTROOT=$out/include RC_OS=common install