refine cubieboard configure, use ubuntu prepare to install tools

@@ -34,10 +34,14 @@ echo "depends tools are ok"
 OS_IS_UBUNTU=NO
 function Ubuntu_prepare()
 {
+    if [ $SRS_CUBIE = YES ]; then
+        echo "for cubieboard, use ubuntu prepare"
+    else
         uname -v|grep Ubuntu >/dev/null 2>&1
         ret=$?; if [[ 0 -ne $ret ]]; then
             return 0;
         fi
+    fi
 
     OS_IS_UBUNTU=YES
     echo "Ubuntu detected, install tools if needed"