libvpx: Pull from upstream

source/libvpx/test/sad_test.cc

Index: source/libvpx/test/sad_test.cc
===================================================================
--- source/libvpx/test/sad_test.cc	(revision 207479)
+++ source/libvpx/test/sad_test.cc	(working copy)
@@ -26,6 +26,7 @@
 }
 
 #include "test/acm_random.h"
+#include "test/clear_system_state.h"
 #include "test/register_state_check.h"
 #include "test/util.h"
 #include "third_party/googletest/src/include/gtest/gtest.h"
@@ -67,6 +68,10 @@
     reference_data_ = NULL;
   }
 
+  virtual void TearDown() {
+    libvpx_test::ClearSystemState();
+  }
+
  protected:
   // Handle blocks up to 4 blocks 64x64 with stride up to 128
   static const int kDataAlignment = 16;