layers: Canonicalize function names in log_msg()
layers: Canonicalize function names in log_msg()

For consistancy, Vulkan function names in log_msg strings should
include the vk prefix and end with parens.

Also fix some typos and cut/paste errors.

This only touches lines related to VL-69; it is not a sweep
of all instances in the code.

Change-Id: I41a8f0c9d3b93203f67aef3fa570eb8d95725d31

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers