vp9: add lf_deltas fate test.

Sample available at:
http://downloads.webmproject.org/test_data/libvpx/vp90-2-09-lf_deltas.webmSigned-off-by: Michael Niedermayer <michaelni@gmx.at>

tests/fate/vpx.mak

@@ -100,6 +100,7 @@ $(foreach W,$(VP9_SIZE_A),$(eval $(foreach H,$(VP9_SIZE_A),$(eval $(call FATE_VP
 $(foreach W,$(VP9_SIZE_B),$(eval $(foreach H,$(VP9_SIZE_B),$(eval $(call FATE_VP9_SUITE,03-size-$(W)x$(H),$(1),$(2))))))
 $(eval $(call FATE_VP9_SUITE,03-deltaq,$(1),$(2)))
 $(eval $(call FATE_VP9_SUITE,06-bilinear,$(1),$(2)))
+$(eval $(call FATE_VP9_SUITE,09-lf_deltas,$(1),$(2)))
 $(eval $(call FATE_VP9_SUITE,2pass-akiyo,$(1),$(2)))
 $(eval $(call FATE_VP9_SUITE,parallelmode-akiyo,$(1),$(2)))
 $(eval $(call FATE_VP9_SUITE,segmentation-aq-akiyo,$(1),$(2)))

tests/ref/fate/vp9-09-lf_deltas

+#format: frame checksums
+#version: 1
+#hash: MD5
+#tb 0: 1/30
+#stream#, dts,        pts, duration,     size, hash
+0,          0,          0,        1,   126720, a83c7f4602f595fd09e97f8c8a7277ec
+0,          1,          1,        1,   126720, 53e1a3fd44932883a8dd112bbb0e359f
+0,          2,          2,        1,   126720, 4bb16d168f9f0a7702c31a68bb8ff36c
+0,          3,          3,        1,   126720, 1b2df157913aba96553aaf8d51491bf3
+0,          4,          4,        1,   126720, 9d041532e42fca7a4062cd3e9b75413b
+0,          5,          5,        1,   126720, 0dbac5ca06e13714d10e99042aefe375
+0,          6,          6,        1,   126720, bb83a507a65d2a640b08f42a77bb37f6
+0,          7,          7,        1,   126720, 176f992d37c7daa36135cddb49398de3
+0,          8,          8,        1,   126720, c41834f72b3281cf6aaa66fd7416e6c3
+0,          9,          9,        1,   126720, 790d4e6b1609dec782ff978e2003d318
+0,         10,         10,        1,   126720, 449622f741f7577c1d721f2e9eb25091
+0,         11,         11,        1,   126720, 8ef8543f7895c87ab04491b0150628e5
+0,         12,         12,        1,   126720, 88ef626aca4b2bcb8c58a69db20a7b02
+0,         13,         13,        1,   126720, 4b2f7adc2e1872ecdd9ffa7d1f1df4a6
+0,         14,         14,        1,   126720, 7b162660225022ef31e39c34fee3418e
+0,         15,         15,        1,   126720, 2b439a4b846edcc69cdf6075de5ac8fb
+0,         16,         16,        1,   126720, ba2eb1ba0ed9abf701a53a94c9c626fc
+0,         17,         17,        1,   126720, 9fbec5d5334fd5e917feee756b652d93
+0,         18,         18,        1,   126720, 93b5eb99ea54abc5fa90c5674499e27e
+0,         19,         19,        1,   126720, 04a98408e9b0aed28932ef1dfdcfdb6c
+0,         20,         20,        1,   126720, 9856ba976bed30bc790a3f28e926b092
+0,         21,         21,        1,   126720, 2b0f450e9724cfc57b846148ff876e51
+0,         22,         22,        1,   126720, 163757f3529369b9789ea606387b831d
+0,         23,         23,        1,   126720, de5ed2aff936c54f3378d0dcc2575d13
+0,         24,         24,        1,   126720, 1f642826b8a6fb111c7c6130481dab89
+0,         25,         25,        1,   126720, b8e3a77c7d3c5c56f67aa7409fb5404c
+0,         26,         26,        1,   126720, eb06cb4f471e42d7fc06929a442cca8b
+0,         27,         27,        1,   126720, 53471649a5080b306d2c04a4f7673bdf
+0,         28,         28,        1,   126720, 70996be0cc5d2bd97025015dd50caa99
+0,         29,         29,        1,   126720, ff3280a8562fdf6697c4a7cb9c1bf0a0