ART: Turn on dex2oat watchdog on target

Activates the watchdog on device.

Bug: 16364458
Change-Id: Id7c86f5a345da35b97bc7fa1a95c86e8685f8fcd
diff --git a/dex2oat/dex2oat.cc b/dex2oat/dex2oat.cc
index 77946b0..eceebaf 100644
--- a/dex2oat/dex2oat.cc
+++ b/dex2oat/dex2oat.cc
@@ -836,7 +836,7 @@
   bool explicit_include_patch_information = false;
   bool include_debug_symbols = kIsDebugBuild;
   bool dump_slow_timing = kIsDebugBuild;
-  bool watch_dog_enabled = !kIsTargetBuild;
+  bool watch_dog_enabled = true;
   bool generate_gdb_information = kIsDebugBuild;
 
   bool explicit_null_checks = true;