Skew initial probabilities for wedge/comp-segment

Since wedge is not used for blocks > 32x32, skew the
initial probabilities to make the wedge probability
as small as possible.

Change-Id: Ide6b428c60f19481d7cae613aef6ed02a6961901

av1/common/entropymode.c

@@ -1047,9 +1047,9 @@ static const aom_prob
 #endif
       { 208, 128 }, { 208, 128 }, { 208, 128 }, { 208, 128 }, { 208, 128 },
       { 208, 128 }, { 216, 128 }, { 216, 128 }, { 216, 128 }, { 224, 128 },
-      { 224, 128 }, { 240, 128 }, { 240, 128 },
+      { 224, 1 },   { 240, 1 },   { 240, 1 },
 #if CONFIG_EXT_PARTITION
-      { 255, 200 }, { 255, 200 }, { 255, 200 },
+      { 255, 1 },   { 255, 1 },   { 255, 1 },
 #endif  // CONFIG_EXT_PARTITION
     };
 #elif !CONFIG_COMPOUND_SEGMENT && CONFIG_WEDGE