Update hyperkit Go bindings

Fixes location of hyperkit executable with recent builds of Docker for Mac

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

vendor/github.com/docker/hyperkit/README.md

@@ -46,7 +46,7 @@ Notes:
   hyperkit so the build will find the ocaml environment.
 - Any previous pin of `mirage-block-unix` or `qcow`
   should be removed with the commands:
-
+  
   ```sh
   $ opam update
   $ opam pin remove mirage-block-unix

vendor/github.com/docker/hyperkit/README.xhyve.md

@@ -28,7 +28,7 @@ If you have homebrew, then simply:
 
 The `--HEAD` in the brew command ensures that you always get the latest changes, even if the homebrew database is not yet updated. If for any reason you don't want that simply do `brew install xhyve` .
 
-if not then:
+if not then:  
 
 Building
 --------
@@ -152,7 +152,7 @@ xhyve architecture
         ------------------------------┼------------------------------
                                       |syscall            xnu kernel
                                       V
-
+        
                                    VMX host
                                VMX nested paging
 

vendor/github.com/docker/hyperkit/go/hyperkit.go

@@ -60,6 +60,7 @@ const (
 var defaultHyperKits = []string{"hyperkit",
 	"com.docker.hyperkit",
 	"/usr/local/bin/hyperkit",
+	"/Applications/Docker.app/Contents/Resources/bin/hyperkit",
 	"/Applications/Docker.app/Contents/MacOS/com.docker.hyperkit"}
 
 // HyperKit contains the configuration of the hyperkit VM