Update uv_mode_cdf tables once per frame.

Move computing the uv_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I627b59d30726c913f5d7ba7753cb0446a12655bb
diff --git a/av1/common/entropymode.c b/av1/common/entropymode.c
index d16f4f7..6d90972 100644
--- a/av1/common/entropymode.c
+++ b/av1/common/entropymode.c
@@ -1413,6 +1413,8 @@
 #if CONFIG_DAALA_EC
   av1_tree_to_cdf_1D(av1_intra_mode_tree, fc->y_mode_prob, fc->y_mode_cdf,
                      BLOCK_SIZE_GROUPS);
+  av1_tree_to_cdf_1D(av1_intra_mode_tree, fc->uv_mode_prob, fc->uv_mode_cdf,
+                     INTRA_MODES);
   av1_tree_to_cdf_1D(av1_switchable_interp_tree, fc->switchable_interp_prob,
                      fc->switchable_interp_cdf, SWITCHABLE_FILTER_CONTEXTS);
   av1_tree_to_cdf_2D(av1_ext_tx_tree, fc->intra_ext_tx_prob,