CFG: Corrected the licenses in cfg_i.cpp and cfg_u.cpp

src/core/hle/service/cfg/cfg_i.cpp

@@ -1,5 +1,5 @@
 // Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #include "common/log.h"

src/core/hle/service/cfg/cfg_u.cpp

@@ -1,5 +1,5 @@
 // Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #include "common/file_util.h"