Replace all include guard ifdefs with "#pragma once"

Source/Core/Core/PowerPC/GDBStub.h

@@ -1,24 +1,10 @@
-// Copyright (C) 2010 Dolphin Project.
-
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, version 2.0.
-
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License 2.0 for more details.
-
-// A copy of the GPL 2.0 should have been included with the program.
-// If not, see http://www.gnu.org/licenses/
-
-// Official SVN repository and contact information can be found at
-// http://code.google.com/p/dolphin-emu/
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
 
 // Originally written by Sven Peter <sven@fail0verflow.com> for anergistic.
 
-#ifndef GDB_H__
-#define GDB_H__
+#pragma once
 
 #include <signal.h>
 #include "Common.h"
@@ -55,5 +41,3 @@ int  gdb_bp_w(u32 addr);
 int  gdb_bp_a(u32 addr);
 
 bool gdb_add_bp(u32 type, u32 addr, u32 len);
-
-#endif