Fix transitions for image_download and activation

Change-Id: I713ada52eef9d275c7d7596026e178c7382e8335
diff --git a/vendor/golang.org/x/sys/windows/service.go b/vendor/golang.org/x/sys/windows/service.go
index 847e00b..f54ff90 100644
--- a/vendor/golang.org/x/sys/windows/service.go
+++ b/vendor/golang.org/x/sys/windows/service.go
@@ -65,6 +65,7 @@
 	SERVICE_ACCEPT_HARDWAREPROFILECHANGE = 32
 	SERVICE_ACCEPT_POWEREVENT            = 64
 	SERVICE_ACCEPT_SESSIONCHANGE         = 128
+	SERVICE_ACCEPT_PRESHUTDOWN           = 256
 
 	SERVICE_CONTROL_STOP                  = 1
 	SERVICE_CONTROL_PAUSE                 = 2
@@ -80,6 +81,7 @@
 	SERVICE_CONTROL_HARDWAREPROFILECHANGE = 12
 	SERVICE_CONTROL_POWEREVENT            = 13
 	SERVICE_CONTROL_SESSIONCHANGE         = 14
+	SERVICE_CONTROL_PRESHUTDOWN           = 15
 
 	SERVICE_ACTIVE    = 1
 	SERVICE_INACTIVE  = 2