Implement initial VK_EXT_debug_utils changes

This affects the loader, scripts, and layers and introduces the
changes to support the VK_EXT_debug_utils extension.

Change-Id: Ia5336f63e85b00f1e59416c06aacd4ae331fd692
diff --git a/layers/vk_layer_config.h b/layers/vk_layer_config.h
index b12ba50..e0b9d32 100644
--- a/layers/vk_layer_config.h
+++ b/layers/vk_layer_config.h
@@ -63,7 +63,9 @@
                                             uint32_t option_default);
 
 VK_LAYER_EXPORT void setLayerOption(const char *_option, const char *_val);
-VK_LAYER_EXPORT void print_msg_flags(VkFlags msgFlags, char *msg_flags);
+VK_LAYER_EXPORT void PrintMessageFlags(VkFlags vk_flags, char *msg_flags);
+VK_LAYER_EXPORT void PrintMessageSeverity(VkFlags vk_flags, char *msg_flags);
+VK_LAYER_EXPORT void PrintMessageType(VkFlags vk_flags, char *msg_flags);
 
 #ifdef __cplusplus
 }