neon hadamard 16x16

Runs about twice as fast as C

BUG=webm:1027

Change-Id: I6760d99f4e22259439ca35d746194b12a81bfa71
diff --git a/test/hadamard_test.cc b/test/hadamard_test.cc
index d21c28a..7a5bd5b 100644
--- a/test/hadamard_test.cc
+++ b/test/hadamard_test.cc
@@ -212,4 +212,9 @@
 INSTANTIATE_TEST_CASE_P(SSE2, Hadamard16x16Test,
                         ::testing::Values(&vpx_hadamard_16x16_sse2));
 #endif  // HAVE_SSE2
+
+#if HAVE_NEON
+INSTANTIATE_TEST_CASE_P(NEON, Hadamard16x16Test,
+                        ::testing::Values(&vpx_hadamard_16x16_neon));
+#endif  // HAVE_NEON
 }  // namespace