curl: fixup build on darwin after update

> checking for connect in libraries... cannot find connect
> configure: error: cannot find connect function in libraries.

pkgs/tools/networking/curl/default.nix

@@ -26,6 +26,8 @@
 , zlibSupport ? true, zlib
 , zstdSupport ? false, zstd
 
+, darwin
+
 # for passthru.tests
 , coeurl
 , curlpp
@@ -70,6 +72,10 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeBuildInputs = [ pkg-config perl ];
 
+  buildInputs = lib.optionals stdenv.isDarwin [
+    darwin.apple_sdk.frameworks.CoreServices
+  ];
+
   # Zlib and OpenSSL must be propagated because `libcurl.la' contains
   # "-lz -lssl", which aren't necessary direct build inputs of
   # applications that use Curl.