protobuf-3.0: enableParallelBuilding = true

Otherwise it takes quite a long time to build.

+2
+2
pkgs/development/libraries/protobuf/3.0.nix
··· 23 24 buildInputs = [ autoreconfHook zlib ]; 25 26 doCheck = true; 27 28 meta = {
··· 23 24 buildInputs = [ autoreconfHook zlib ]; 25 26 + enableParallelBuilding = true; 27 + 28 doCheck = true; 29 30 meta = {