Apply the rect fwd tx changes to SSE2 optimization

- Apply changes on tx_size: 4x8, 8x4, 8x16, 16x8.
- Turn on corresponding unit tests on SSE2.
- Partially fix aomedia:113.

Change-Id: I29d15540ab8e9e3681e9caa54e5162bcbbd7af11

test/av1_fht8x16_test.cc

diff --git a/test/av1_fht8x16_test.cc b/test/av1_fht8x16_test.cc
index 294219b..88c38ac 100644
--- a/test/av1_fht8x16_test.cc
+++ b/test/av1_fht8x16_test.cc
@@ -121,7 +121,7 @@
   make_tuple(&av1_fht8x16_sse2, &av1_iht8x16_128_add_sse2, 15, AOM_BITS_8, 128)
 #endif  // CONFIG_EXT_TX
 };
-INSTANTIATE_TEST_CASE_P(DISABLED_SSE2, AV1Trans8x16HT,
+INSTANTIATE_TEST_CASE_P(SSE2, AV1Trans8x16HT,
                         ::testing::ValuesIn(kArrayHt8x16Param_sse2));
 #endif  // HAVE_SSE2 && !CONFIG_EMULATE_HARDWARE