lame: prevent build failure from using outdated symbol list

Before this change, trying to build LAME on Darwin would throw an error:

Undefined symbols for architecture x86_64:
  "_lame_init_old", referenced from:
     -exported_symbol[s_list] command line option
ld: symbol(s) not found for architecture x86_64
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)

pkgs/development/libraries/lame/default.nix

@@ -55,6 +55,12 @@ stdenv.mkDerivation rec {
     (if debugSupport then "--enable-debug=alot" else "")
   ];
 
+  preConfigure = ''
+    # Prevent a build failure for 3.100 due to using outdated symbol list
+    # https://hydrogenaud.io/index.php/topic,114777.msg946373.html#msg946373
+    sed -i '/lame_init_old/d' include/libmp3lame.sym
+  '';
+
   meta = {
     description = "A high quality MPEG Audio Layer III (MP3) encoder";
     homepage    = http://lame.sourceforge.net;