Fix ws-testcase build issue:

Fix ws-testcase build issue:

- Issue:
   undefined reference to '__tpl_display_choose_backend_wl_egl_thread'
   undefined refetence to '__tpl_display_choose_backend_wayland_vk_wsi'

- Fix:
   Replace __tpl_display_choose_backend_wl_egl_thread() with __tpl_display_choose_backend_wl_egl_thread2()
   Replace __tpl_display_choose_backend_wayland_vk_wsi() with __tpl_display_choose_backend_wayland_vk_wsi_thread()

Change-Id: I1d562bbaf37c4c45b238e221b125bdb42cc6db1a
Signed-off-by: Tianhao Ni <tianhao.ni@samsung.com>