Add calls for drawing the square
Add calls for drawing the square

This means not only feeding the GPU with more vertex data, but
also switching the transform matrix uniform and issuing the proper
draw call.

TheFakeMontyOnTheRun/nehe-ndk-gles20,TheFakeMontyOnTheRun/nehe-ndk-gles20,TheFakeMontyOnTheRun/nehe-ndk-gles20