[Emulator] Improvements to launch_data

Added support for autoload titles on boot with:
- Specific launch data
- Specific xex
- Restarting into packages: XamContentLaunchImageFromFileInternal

src/xenia/emulator.h

@@ -52,6 +52,8 @@ class Window;
 namespace xe {
 
 constexpr fourcc_t kEmulatorSaveSignature = make_fourcc("XSAV");
+static const std::string kDefaultGameSymbolicLink = "GAME:";
+static const std::string kDefaultPartitonSymbolicLink = "D:";
 
 // The main type that runs the whole emulator.
 // This is responsible for initializing and managing all the various subsystems.