Fix the problem that "ADE" downloaded from GitCode doesn't work.

cmake/mirrors/gitcode.cmake

@@ -64,7 +64,7 @@ macro(ocv_download_url_gitcode_archive_release SUBDIR)
     list(GET DL_URL_split 4 __REPO_NAME)
     set(DL_URL "https://gitcode.net/${__OWNER}/${__REPO_NAME}/-/archive/${${DL_ID}_RELEASE_GITCODE}/${__REPO_NAME}-")
     set(DL_HASH "${${DL_ID}_PKG_MD5_GITCODE}")
-    set(SUBDIR "${${DL_ID}_PKG_NAME_GITCODE}" PARENT_SCOPE)
+    set(${SUBDIR} "${${DL_ID}_PKG_NAME_GITCODE}" PARENT_SCOPE)
   else()
     message(WARNING "Package ${DL_ID} from mirror gitcode.net is outdated and will be downloaded from github.com instead.")
   endif()