layers: Fix Superfluous inttypes.h Includes

layers: Fix Superfluous inttypes.h Includes

The files that explicitly include <inttypes.h> are C++ files. The
convention for including C header files in C++ programs is to use a
special C++ header file that wraps the C header file. For example
<inttypes.h> would be included as <cinttypes>.

In vk_layer_logging.h:34 <cinttypes> is included.

In buffer_validation.cpp and parameter_validation_utils.cpp
"vk_layer_logging.h" is directly included.

In core_validation.cpp "vk_layer_logging.h" is indirectly included via
core_validation.h

This change removes the invalid and superfluous use of C header files
from the aforementioned C++ files.

Change-Id: I1bed9ea4bf6c3bb98ac5ae05ad227c0da58acb2c
Reviewed-by: dkoch
Reviewed-by: ddadap