Fix the OSX build.

Turns out Dolphin uses some macros that clash on OSX. However thankfully, this include is only used in Frame.cpp.

Source/Core/DolphinWX/Frame.cpp

@@ -10,6 +10,10 @@
 // m_Panel. The new child window handle that is returned by CreateWindow() can
 // be accessed from Core::GetWindowHandle().
 
+#ifdef __APPLE__
+#include <Cocoa/Cocoa.h>
+#endif
+
 #include <wx/datetime.h>
 
 #include "Common/Common.h"
@@ -43,7 +47,6 @@ extern "C" {
 #include "DolphinWX/resources/Dolphin.c" // Dolphin icon
 };
 
-
 #ifdef _WIN32
 // I could not use FindItemByHWND() instead of this, it crashed on that occasion I used it */
 HWND MSWGetParent_(HWND Parent)

Source/Core/DolphinWX/Frame.h

@@ -15,10 +15,6 @@
 #include <wx/aui/aui.h>
 #include <wx/tooltip.h>
 
-#ifdef __APPLE__
-#include <Cocoa/Cocoa.h>
-#endif
-
 #include "Common/CDUtils.h"
 #include "Core/Movie.h"
 #include "DolphinWX/Globals.h"