Change the copyright from google to XDean

I have create [pull
request](google/compile-testing#148) to google
compile-test project. But before it merged, I reserve the copyright.

Author: XDean

src/main/java/xdean/annotation/processor/toolkit/test/Compile.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Google, Inc.
+ * Copyright (C) 2018 XDean
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/xdean/annotation/processor/toolkit/test/CompileTestCase.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Google, Inc.
+ * Copyright (C) 2018 XDean.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/xdean/annotation/processor/toolkit/test/CompileTestRunner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Google, Inc.
+ * Copyright (C) 2018 XDean.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/xdean/annotation/processor/toolkit/test/Compiled.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Google, Inc.
+ * Copyright (C) 2018 XDean.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/xdean/annotation/processor/toolkit/test/package-info.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Google, Inc.
+ * Copyright (C) 2018 XDean.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.