Bump src/gnatsd

Bump apcera/gnatsd:
  Phil Pennock:
     Merge branch 'note_versions' ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/33650103 )
     Add build instructions & version constraint notes ( Travis Unknown )
  Ken Robertson:
     Fix gofmt issues ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/32404911 )
     Fix Travis to properly fail the build on go fmt and go vet. ( Travis Failed: https://travis-ci.org/apcera/gnatsd/builds/32404824 )
     Added Server.Addr() helper to allow querying of the server's bound address ( Travis Unknown )
  Derek Collison:
     Merge pull request #39 from WuLonghui/hw-issue-1 ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/32340949 )
     Merge pull request #34 from simonleung8/selfReferenceFix ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/31357339 )
     Changed travis image link. ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/30877701 )
     Merge pull request #37 from apcera/coveralls.yml ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/30876789 )
     Merge pull request #36 from apcera/add-coveralls ( Travis Failed: https://travis-ci.org/apcera/gnatsd/builds/30876077 )
     Just test 1.3 ( Travis Success: https://travis-ci.org/apcera/gnatsd/builds/30799027 )
     Make sure to account for route connections ( Travis Failed: https://travis-ci.org/apcera/gnatsd/builds/30798354 )
     test fixups for 1.3, add in test for leaked route Go routines ( Travis Unknown )
     Fix minor races, add in 1.3 to testing, bump version ( Travis Unknown )
     Docker support for generating single executable image ( Travis Unknown )
     Added cluster restart test with queue subscribers ( Travis Unknown )
     Reload config option. ( Travis Unknown )
     Added some 1.3 options. ( Travis Unknown )
     Merge pull request #31 from apcera/add-addr-helper ( Travis Unknown )
     Moved travis status. ( Travis Unknown )
  w00228948:
     Use authTimeout in setAuthTimer ( Travis Unknown )
  Simon Leung:
     remove self referencing ip/host ( Travis Unknown )
  Jonathon Klobucar:
     Should have been included from the coveralls instructions to know more. ( Travis Unknown )
     Add a small script to run the tests and report to coveralls in travis. ( Travis Unknown )
  Alex Toombs:
     Merge pull request #32 from apcera/allow-external-listener ( Travis Unknown )
     Write back resolved port to options. ( Travis Unknown )
     PR feedback (nits) ( Travis Unknown )
     Allow nats to choose a random port when given port -1. ( Travis Unknown )

[#74057366]