layers: Turn unsupported exts. error into warning
diff --git a/scripts/layer_chassis_generator.py b/scripts/layer_chassis_generator.py
index 82bab06..bc53398 100644
--- a/scripts/layer_chassis_generator.py
+++ b/scripts/layer_chassis_generator.py
@@ -505,7 +505,7 @@
     for (uint32_t i = 0; i < pCreateInfo->enabledExtensionCount; i++) {
         // Check for recognized instance extensions
         if (!white_list(pCreateInfo->ppEnabledExtensionNames[i], kInstanceExtensionNames)) {
-            log_msg(layer_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, 0,
+            log_msg(layer_data->report_data, VK_DEBUG_REPORT_WARNING_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, 0,
                     kVUIDUndefined,
                     "Instance Extension %s is not supported by this layer.  Using this extension may adversely affect validation "
                     "results and/or produce undefined behavior.",
@@ -519,7 +519,7 @@
     for (uint32_t i = 0; i < pCreateInfo->enabledExtensionCount; i++) {
         // Check for recognized device extensions
         if (!white_list(pCreateInfo->ppEnabledExtensionNames[i], kDeviceExtensionNames)) {
-            log_msg(layer_data->report_data, VK_DEBUG_REPORT_ERROR_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, 0,
+            log_msg(layer_data->report_data, VK_DEBUG_REPORT_WARNING_BIT_EXT, VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT, 0,
                     kVUIDUndefined,
                     "Device Extension %s is not supported by this layer.  Using this extension may adversely affect validation "
                     "results and/or produce undefined behavior.",