dct32x32_test: add NEON functions

note not all functions have NEON implementations:
- vp9_fdct32x32/vp9_fdct32x32_rd

Change-Id: I3795d78bf215e41ab8801c2c37cf633f16931f9d

test/dct32x32_test.cc

@@ -248,6 +248,16 @@ INSTANTIATE_TEST_CASE_P(
         make_tuple(&vp9_fdct32x32_c, &vp9_idct32x32_1024_add_c, 0),
         make_tuple(&vp9_fdct32x32_rd_c, &vp9_idct32x32_1024_add_c, 1)));
 
+#if HAVE_NEON
+INSTANTIATE_TEST_CASE_P(
+    NEON, Trans32x32Test,
+    ::testing::Values(
+        make_tuple(&vp9_fdct32x32_c,
+                   &vp9_idct32x32_1024_add_neon, 0),
+        make_tuple(&vp9_fdct32x32_rd_c,
+                   &vp9_idct32x32_1024_add_neon, 1)));
+#endif
+
 #if HAVE_SSE2
 INSTANTIATE_TEST_CASE_P(
     SSE2, Trans32x32Test,