Go update to 1.10.1 (#6010)
Go update to 1.10.1 (#6010)

* Update go distribution to 1.10.1
* Add updates to go src to fix ./pants test run

(sapling split of 8af84069195e15b2eb78f552de9db10bd88ff9eb)

foursquare/fsqio,foursquare/fsqio,foursquare/fsqio,foursquare/fsqio,foursquare/fsqio