include: Rename vkLayer.h -> vk_layer.h and vkIcd.h -> vk_icd.h
diff --git a/layers/multi.cpp b/layers/multi.cpp
index 28dacf9..4705b0c 100644
--- a/layers/multi.cpp
+++ b/layers/multi.cpp
@@ -29,7 +29,7 @@
 #include <unordered_map>
 #include "loader_platform.h"
 #include "vk_dispatch_table_helper.h"
-#include "vkLayer.h"
+#include "vk_layer.h"
 // The following is #included again to catch certain OS-specific functions
 // being used:
 #include "loader_platform.h"