common/uint128: Add missing top-file source text

src/common/uint128.cpp

@@ -1,3 +1,7 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
 #ifdef _MSC_VER
 #include <intrin.h>
 

src/common/uint128.h

@@ -1,3 +1,6 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
 
 #include <utility>
 #include "common/common_types.h"