fate: run avconv with -nostats flag

Signed-off-by: Mans Rullgard <mans@mansr.com>

tests/fate-run.sh

@@ -50,7 +50,7 @@ run(){
 }
 
 avconv(){
-    run avconv -v 0 -threads $threads -thread_type $thread_type "$@"
+    run avconv -nostats -threads $threads -thread_type $thread_type "$@"
 }
 
 framecrc(){

tests/regression-funcs.sh

@@ -43,7 +43,7 @@ echov(){
 
 . $(dirname $0)/md5.sh
 
-AVCONV_OPTS="-v 0 -y"
+AVCONV_OPTS="-nostats -y"
 COMMON_OPTS="-flags +bitexact -idct simple -sws_flags +accurate_rnd+bitexact"
 DEC_OPTS="$COMMON_OPTS -threads $threads"
 ENC_OPTS="$COMMON_OPTS -threads 1 -dct fastint"