cmake: fix name+location of SDL2.dll in configure generated SDL2::SDL2 target

sdl2-config.cmake.in

@@ -106,7 +106,7 @@ list(REMOVE_ITEM _sdl2_link_libraries SDL2 SDL2main mingw32 cygwin)
 
 if(WIN32)
   set(_sdl2_implib "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")
-  set(_sdl2_dll "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")
+  set(_sdl2_dll "${SDL2_BINDIR}/SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}")
   if(EXISTS "${_sdl2_implib}" AND EXISTS "${_sdl2_dll}")
     if(NOT TARGET SDL2::SDL2)
       add_library(SDL2::SDL2 SHARED IMPORTED)