erlang: add missing AGL framework for aarch64-darwin

Preventing this:

```
 LD     ../priv/aarch64-apple-darwin20.3.0/wxe_driver.so
ld: file not found: /System/Library/Frameworks/AGL.framework/Versions/A/AGL for architecture arm64
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [Makefile:176: ../priv/aarch64-apple-darwin20.3.0/wxe_driver.so] Error 1
```

pkgs/development/interpreters/erlang/generic-builder.nix

@@ -57,7 +57,7 @@ in stdenv.mkDerivation ({
     ++ optionals odbcSupport odbcPackages
     ++ optionals javacSupport javacPackages
     ++ optional withSystemd systemd
-    ++ optionals stdenv.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [ Carbon Cocoa ]);
+    ++ optionals stdenv.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [ AGL Carbon Cocoa ]);
 
   debugInfo = enableDebugInfo;