[VOL-4290] Voltha go library updates for gRPC migration

Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/golang.org/x/sys/windows/mksyscall.go b/vendor/golang.org/x/sys/windows/mksyscall.go
index 6277057..328e3b2 100644
--- a/vendor/golang.org/x/sys/windows/mksyscall.go
+++ b/vendor/golang.org/x/sys/windows/mksyscall.go
@@ -6,4 +6,4 @@
 
 package windows
 
-//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall_windows.go eventlog.go service.go syscall_windows.go security_windows.go
+//go:generate go run golang.org/x/sys/windows/mkwinsyscall -output zsyscall_windows.go eventlog.go service.go syscall_windows.go security_windows.go