Adjustment to mv cost parameters

Increases these parameters.
There is a small efficiency gain.

Change-Id: Ie5f0ddb39c907d335e0dafa5eb112365a81f4542
derfraw300: +0.091%
stdhdraw250: +0.238%

vp9/encoder/vp9_rdopt.c

diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index 079463c..e18dc29 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -111,8 +111,8 @@
 #define RD_THRESH_INC      1
 #define RD_THRESH_POW      1.25
 
-#define MV_COST_WEIGHT      96
-#define MV_COST_WEIGHT_SUB 102
+#define MV_COST_WEIGHT      108
+#define MV_COST_WEIGHT_SUB  120
 
 static void fill_token_costs(vp9_coeff_cost *c,
                              vp9_coeff_probs_model (*p)[BLOCK_TYPES]) {