layers: rename VkDbgObjectType

VkDebugReportObjectTypeLUNARG fits the extension naming requirements
diff --git a/layers/vk_layer_logging.h b/layers/vk_layer_logging.h
index 110c497..47c6877 100644
--- a/layers/vk_layer_logging.h
+++ b/layers/vk_layer_logging.h
@@ -52,7 +52,7 @@
 static inline VkBool32 debug_report_log_msg(
     debug_report_data          *debug_data,
     VkFlags                     msgFlags,
-    VkDbgObjectType             objectType,
+    VkDebugReportObjectTypeLUNARG             objectType,
     uint64_t                    srcObject,
     size_t                      location,
     int32_t                     msgCode,
@@ -257,7 +257,7 @@
 static inline VkBool32 log_msg(
     debug_report_data          *debug_data,
     VkFlags                     msgFlags,
-    VkDbgObjectType             objectType,
+    VkDebugReportObjectTypeLUNARG             objectType,
     uint64_t                    srcObject,
     size_t                      location,
     int32_t                     msgCode,
@@ -268,7 +268,7 @@
 static inline VkBool32 log_msg(
     debug_report_data          *debug_data,
     VkFlags                     msgFlags,
-    VkDbgObjectType             objectType,
+    VkDebugReportObjectTypeLUNARG             objectType,
     uint64_t                    srcObject,
     size_t                      location,
     int32_t                     msgCode,
@@ -294,7 +294,7 @@
 
 static inline VKAPI_ATTR VkBool32 VKAPI_CALL log_callback(
     VkFlags                             msgFlags,
-    VkDbgObjectType                     objType,
+    VkDebugReportObjectTypeLUNARG                     objType,
     uint64_t                            srcObject,
     size_t                              location,
     int32_t                             msgCode,
@@ -315,7 +315,7 @@
 
 static inline VKAPI_ATTR VkBool32 VKAPI_CALL win32_debug_output_msg(
     VkFlags                             msgFlags,
-    VkDbgObjectType                     objType,
+    VkDebugReportObjectTypeLUNARG                     objType,
     uint64_t                            srcObject,
     size_t                              location,
     int32_t                             msgCode,