opencv4.2编译扩展模块opencv_contrib缺少的boostdesc_bgm.i，boostdesc_binboost_064.i等文件

VS编译opencv4.2扩展模块opencv_contrib-master缺失文件，下载失败，手动地址下载也失败的，可以下载本资源，解压后直接放到opencv_contrib-master\modules\xfeatures2d\src文件夹内，文件列表：
boostdesc_bgm.i
boostdesc_bgm_bi.i
boostdesc_bgm_hd.i
boostdesc_binboost_064.i
boostdesc_binboost_128.i
boostdesc_binboost_256.i
boostdesc_lbgm.i
generated_16.i
generated_32.i
generated_64.i
vgg_generated_48.i
vgg_generated_64.i
vgg_generated_80.i
vgg_generated_120.i