Creating logging mechanism for debugging

Introduce a logging mechanism in the layer for replacing the
old ones used in individual files.

Change-Id: I7559f8a99396eeb0b9da6e5ef58cc4b7bd5a82af
Signed-off-by: Fufu Fang <fufu.fang@arm.com>
1 job for features_wayland in 1 minute and 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #9317344
build_vulkan_wsi_layer

00:01:12