Initialize all of class Thread's fields.

Change-Id: I28f1539bbcfebe06e62de692d306b479ed3eaead
diff --git a/src/thread.cc b/src/thread.cc
index 86994cf..e44590a 100644
--- a/src/thread.cc
+++ b/src/thread.cc
@@ -849,12 +849,17 @@
       wait_cond_(new ConditionVariable("Thread wait condition variable")),
       wait_monitor_(NULL),
       interrupted_(false),
+      wait_next_(NULL),
+      card_table_(0),
       stack_end_(NULL),
       top_of_managed_stack_(),
+      top_of_managed_stack_pc_(0),
       native_to_managed_record_(NULL),
       top_sirt_(NULL),
       jni_env_(NULL),
       state_(Thread::kUnknown),
+      self_(NULL),
+      runtime_(NULL),
       exception_(NULL),
       suspend_count_(0),
       class_loader_override_(NULL),