GLES2Debugger: Added DbgContext and vertex data capturing.

Send VBO related commands to client, which tracks the state.
Maintain index buffer content and vertex attrib pointer/buffer state on server.
During glDrawArrays/Elements, send user memory data to client.

Change-Id: Ia920e90479329b301ae4b5735e833eeb20293c94
Signed-off-by: David Li <davidxli@google.com>
17 files changed