Skip duplicated vertex binding

Skip duplicated vertex binding

Let we skip some useless commands for vertex attributes binding.
If latest rendered geometry is same as previous, we don't need to
re-bind vertex attributes.

For hueristic way, Most of Visuals, like image and text, are used
simplest QUAD geometry. So for real world app are use only 1 geometry.
We can reduce for this case's rendering time.

Change-Id: I3643bdb728964365f42284dec3ff0ab77819f42b
Signed-off-by: Eunki Hong <eunkiki.hong@samsung.com>