treewide: Add lots of platforms to packages with no meta

Build-tested on x86_64 Linux and on Darwin.

pkgs/development/libraries/sofia-sip/default.nix

@@ -10,4 +10,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ glib openssl ];
   nativeBuildInputs = [ pkgconfig ];
+
+  meta = {
+    platforms = stdenv.lib.platforms.linux;
+  };
 }