Merge pull request #127502 from Mindavi/a52dec/cross

a52dec: support cross-compilation

pkgs/development/libraries/a52dec/default.nix

···
     "--enable-shared"
   ];
 
+  makeFlags = [
+    "AR=${stdenv.cc.targetPrefix}ar"
+  ];
+
   # fails 1 out of 1 tests with "BAD GLOBAL SYMBOLS" on i686
   # which can also be fixed with
   # hardeningDisable = lib.optional stdenv.isi686 "pic";