layers: Fix khronos layer props name

Caused test failures on Android platforms.

Change-Id: I25e391c6ef4b15272617c6f3529f6f89c510d285
diff --git a/scripts/layer_chassis_generator.py b/scripts/layer_chassis_generator.py
index 7dca1bf..9126041 100644
--- a/scripts/layer_chassis_generator.py
+++ b/scripts/layer_chassis_generator.py
@@ -458,7 +458,7 @@
 #endif
 
 // Set layer name -- Khronos layer name overrides any other defined names
-#if BUILD_KNRONOS_VALIDATION
+#if BUILD_KHRONOS_VALIDATION
 #define OBJECT_LAYER_NAME "VK_LAYER_KHRONOS_validation"
 #define OBJECT_LAYER_DESCRIPTION "khronos_validation"
 #elif BUILD_OBJECT_TRACKER