mesos-dns: Update to newer commit

Notable upstream changes:
- Support for multiple ports per task
- Records generated for mesos master nodes
- SRV records resolve to hostnames rather than IPs
- Query handling is now properly case-insensitive
- Better AAAA record handling

pkgs/servers/dns/mesos-dns/default.nix

···
   src = fetchFromGitHub {
     owner = "mesosphere";
     repo = "mesos-dns";
-    rev = "29940029d4b0c17142373c3280a8b452722b665b";
-    sha256 = "1fycywhdyymibsahjqx9vnigk3pdis3hnmfbxp74pmd9xqqlyv1n";
+    rev = "f37051fc5a723eb021797e7d57d92755c011a28e";
+    sha256 = "0djzd4zdpr4dcp56rqprncan6pcff6gy4wxi9572fmni2ldj4l15";
   };
 
   # Avoid including the benchmarking test helper in the output: