Port Yaowu's 4x4 fDCT test.

Also fix unit testing.

Change-Id: Iacdc6f1ec53388e093cda1c13e4379e83d4a6535

test/test.mk

diff --git a/test/test.mk b/test/test.mk
index bfef823..a9ccaf2 100644
--- a/test/test.mk
+++ b/test/test.mk
@@ -1,3 +1,6 @@
 LIBVPX_TEST_SRCS-yes += test.mk
 LIBVPX_TEST_SRCS-yes += boolcoder_test.cc
+LIBVPX_TEST_SRCS-yes += fdct4x4_test.cc
 LIBVPX_TEST_SRCS-yes += test_libvpx.cc
+
+LIBVPX_TEST_DATA-yes += hantro_collage_w352h288.yuv