Fix of ccui.ScrollView renderer

[yuriilychak]

@pandamicro Hello again. Today i have batch fixing day for my project:) ccui.ScrollView and ccui.ListView have terrible performance, cause every sprite render at single batch.

Steps to reproduce:

1. Create ccui.ListView or ccui.ScrollView;
2. Create ccui.Widget with few (for example 5) Sprites from same atlas in it;
3. Add few (for example 5) Items from previous step to list view;
4. Get bunch draw calls except one. (In example 25);

The problem is in UIScrollViewWebGLRenderCmd.js. It called render command for every sprite.
Solution is call renderer when data dont have uploadData function.
Your code:

for (i = 0, len = locCmds.length; i < len; ++i) {
            cmd = locCmds[i];
            checkNode = cmd._node;

            if (checkNode && checkNode._parent && checkNode._inViewRect == false)
                continue;

            if (cmd.uploadData) {
                cc.renderer._uploadBufferData(cmd);
            }
            else {
                if (cmd._batchingSize > 0) {
                    cc.renderer._batchRendering();
                }
                cmd.rendering(context);
            }
         cc.renderer._batchRendering();
        }

Fix:

for (i = 0, len = locCmds.length; i < len; ++i) {
            cmd = locCmds[i];
            checkNode = cmd._node;

            if (checkNode && checkNode._parent && checkNode._inViewRect == false)
                continue;

            if (cmd.uploadData) {
                cc.renderer._uploadBufferData(cmd);
            }
            else {
                cc.renderer._batchRendering();
                cmd.rendering(context);
            }
        }
        cc.renderer._batchRendering();