include: Use single-quote no paths when including sibling headers
diff --git a/include/vulkan/vk_layer.h b/include/vulkan/vk_layer.h
index 7cc308d..4735bee 100644
--- a/include/vulkan/vk_layer.h
+++ b/include/vulkan/vk_layer.h
@@ -33,9 +33,9 @@
  */
 #pragma once
 
-#include "vulkan/vulkan.h"
-#include <vulkan/vk_ext_debug_report.h>
-#include "vulkan/vk_lunarg_debug_marker.h"
+#include "vulkan.h"
+#include "vk_ext_debug_report.h"
+#include "vk_lunarg_debug_marker.h"
 #if defined(__GNUC__) && __GNUC__ >= 4
 #define VK_LAYER_EXPORT __attribute__((visibility("default")))
 #elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)