[MSVC] Copy SDL2.dll to build folder

CMake now copies SDL2.dll when compiling citra with citra-qt as a target
on MSVC.

src/citra_qt/CMakeLists.txt

@@ -107,14 +107,14 @@ if(UNIX AND NOT APPLE)
     install(TARGETS citra-qt RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
 endif()
 
-if (Qt5_FOUND AND MSVC)
+if (MSVC)
     include(WindowsCopyFiles)
-
+    set(DLL_DEST "${CMAKE_BINARY_DIR}/bin/$<CONFIG>/")
+    windows_copy_files(citra-qt ${SDL2_DLL_DIR} ${DLL_DEST} SDL2.dll)
+    if (Qt5_FOUND)
         set(Qt5_DLL_DIR "${Qt5_DIR}/../../../bin")
         set(Qt5_PLATFORMS_DIR "${Qt5_DIR}/../../../plugins/platforms/")
-    set(DLL_DEST "${CMAKE_BINARY_DIR}/bin/$<CONFIG>/")
         set(PLATFORMS ${DLL_DEST}platforms/)
-
         windows_copy_files(citra-qt ${Qt5_DLL_DIR} ${DLL_DEST}
             icudt*.dll
             icuin*.dll
@@ -125,9 +125,9 @@ if (Qt5_FOUND AND MSVC)
             Qt5Widgets$<$<CONFIG:Debug>:d>.*
         )
         windows_copy_files(citra-qt ${Qt5_PLATFORMS_DIR} ${PLATFORMS} qwindows$<$<CONFIG:Debug>:d>.*)
-
         unset(Qt5_DLL_DIR)
         unset(Qt5_PLATFORMS_DIR)
-    unset(DLL_DEST)
         unset(PLATFORMS)
     endif()
+    unset(DLL_DEST)
+endif()