corechecks: Add license header to core_error_location.cpp

Change-Id: I8b24366308c6caddfab35dd986c8ed6ac5bccf8a

layers/core_error_location.cpp

@@ -1,3 +1,22 @@
+/* Copyright (c) 2021 The Khronos Group Inc.
+ * Copyright (c) 2021 Valve Corporation
+ * Copyright (c) 2021 LunarG, Inc.
+ * Copyright (C) 2021 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: Jeremy Gebben <jeremyg@lunarg.com>
+ */
 #include "core_error_location.h"
 #include <map>