add tile test vectors

1920x1080

vp90-2-08-tile_1x2_frame_parallel.webm
vp90-2-08-tile_1x2.webm
vp90-2-08-tile_1x4_frame_parallel.webm
vp90-2-08-tile_1x4.webm

vpxenc blue_sky_1080p25.y4m \
  --codec=vp9 -p 2 \
  --frame-parallel=${fpm} \
  --tile-columns=${tc} \
  --limit=10 \
  --auto-alt-ref=1 \
  --lag-in-frames=5 \
  --target-bitrate=2500

Change-Id: Id9c94b722cc553a6865d443a94e8482c78b038bb

test/test-data.sha1

diff --git a/test/test-data.sha1 b/test/test-data.sha1
index 57c914b..44220d5 100644
--- a/test/test-data.sha1
+++ b/test/test-data.sha1
@@ -530,3 +530,11 @@
 65e3a7ffef61ab340d9140f335ecc49125970c2c  vp91-2-04-yv444.webm.md5
 0c83a1e414fde3bccd6dc451bbaee68e59974c76  vp90-2-07-frame_parallel.webm
 e5c2c9fb383e5bf3b563480adaeba5b7e3475ecd  vp90-2-07-frame_parallel.webm.md5
+086c7edcffd699ae7d99d710fd7e53b18910ca5b  vp90-2-08-tile_1x2_frame_parallel.webm
+e981ecaabb29a80e0cbc1f4002384965ce8e95bb  vp90-2-08-tile_1x2_frame_parallel.webm.md5
+ed79be026a6f28646c5825da1c12d1fbc70f96a4  vp90-2-08-tile_1x2.webm
+45b404e025841c9750895fc1a9f6bd384fe6a315  vp90-2-08-tile_1x2.webm.md5
+cf8ea970c776797aae71dac8317ea926d9431cab  vp90-2-08-tile_1x4_frame_parallel.webm
+a481fbea465010b57af5a19ebf6d4a5cfe5b9278  vp90-2-08-tile_1x4_frame_parallel.webm.md5
+0203ec456277a01aec401e7fb6c72c9a7e5e3f9d  vp90-2-08-tile_1x4.webm
+c9b237dfcc01c1b414fbcaa481d014a906ef7998  vp90-2-08-tile_1x4.webm.md5