libretro: Additional work

- Reliable resolution switching.
 - Hook up logging.
 - Memory cards and controller type settings.
 - Save state support.
 - Direct3D support.

src/duckstation-libretro/CMakeLists.txt

@@ -5,19 +5,19 @@ add_library(duckstation-libretro SHARED
   libretro_host_display.h
   libretro_host_interface.cpp
   libretro_host_interface.h
+  libretro_opengl_host_display.cpp
+  libretro_opengl_host_display.h
   libretro_settings_interface.cpp
   libretro_settings_interface.h
   main.cpp
-  opengl_host_display.cpp
-  opengl_host_display.h
 )
 
 if(WIN32)
   target_sources(duckstation-libretro PRIVATE
-    d3d11_host_display.cpp
-    d3d11_host_display.h
+    libretro_d3d11_host_display.cpp
+    libretro_d3d11_host_display.h
   )
 endif()
 
-target_link_libraries(duckstation-libretro PRIVATE core common imgui glad scmversion libretro-common)
+target_link_libraries(duckstation-libretro PRIVATE core common imgui glad scmversion frontend-common libretro-common)