tpl_wayland_egl: Modified to track committed wl_buffer using global list.

tpl_wayland_egl: Modified to track committed wl_buffer using global list.

 - If more than one release event is processed for only once committed wl_buffer,
  the tbm_surface that should not be destroyed can be destroyed.
 - Save wl_buffer during from wl_surface_commit to wl_buffer_release to a global list
  called committed_wl_buffers to filter out unwanted release events.

 [The cases of the problem]
  1. Multi-surfaces client.
  2. client want to render in iconified status.

Change-Id: I09ea2f0ba26b7066695971238d9bed003443e9e4
Signed-off-by: Joonbum Ko <joonbum.ko@samsung.com>