core: Move emu_window and key_map into core

* Removes circular dependences (common should not depend on core)

src/citra_qt/bootmanager.cpp

@@ -9,11 +9,11 @@
 #endif
 
 #include "citra_qt/bootmanager.h"
-#include "common/key_map.h"
 #include "common/microprofile.h"
 #include "common/scm_rev.h"
 #include "common/string_util.h"
 #include "core/core.h"
+#include "core/frontend/key_map.h"
 #include "video_core/debug_utils/debug_utils.h"
 #include "video_core/video_core.h"
 

src/citra_qt/bootmanager.h

@@ -9,8 +9,8 @@
 #include <mutex>
 #include <QGLWidget>
 #include <QThread>
-#include "common/emu_window.h"
 #include "common/thread.h"
+#include "core/frontend/emu_window.h"
 
 class QKeyEvent;
 class QScreen;