Autodetecint OS in for external library build
Autodetecint OS in for external library build

hank5000/VPlayer_lib,code-guru/AndroidFFmpeg-appunite,kyawkyaw/AndroidFFmpeg,mrduongnv/AndroidFFmpeg,shine-chen/AndroidFFmpeg-with-RTMP,q273255702/AndroidFFmpeg,mrduongnv/AndroidFFmpeg,xinran505982/AndroidVideoPlayer-master,appunite/AndroidFFmpeg,sitexa/AndroidFFmpeg,QDPeng/AndroidFFmpeg,kyawkyaw/AndroidFFmpeg,appunite/AndroidFFmpeg,10045125/AndroidFFmpeg,ShawnKoo/AndroidFFmpeg,appunite/AndroidFFmpeg,matthewn4444/VPlayer_lib,10045125/AndroidFFmpeg,mobdim/AndroidFFmpeg,mrduongnv/AndroidFFmpeg,shakin/AndroidFFmpeg,shakin/AndroidFFmpeg,hank5000/VPlayer_lib,10045125/AndroidFFmpeg,boke/AndroidFFmpeg,appunite/AndroidFFmpeg,MisterRager/AndroidFFmpeg,q273255702/AndroidFFmpeg,q273255702/AndroidFFmpeg,shine-chen/AndroidFFmpeg-with-RTMP,shakin/AndroidFFmpeg,mobdim/AndroidFFmpeg,boke/AndroidFFmpeg,10045125/AndroidFFmpeg,code-guru/AndroidFFmpeg-appunite,ShawnKoo/AndroidFFmpeg,QDPeng/AndroidFFmpeg,kyawkyaw/AndroidFFmpeg,MisterRager/AndroidFFmpeg,code-guru/AndroidFFmpeg-appunite,mondoktamas/AndroidFFmpeg,xinran505982/AndroidVideoPlayer-master,zzhhui/AndroidFFmpeg,boke/AndroidFFmpeg,QDPeng/AndroidFFmpeg,sitexa/AndroidFFmpeg,ShawnKoo/AndroidFFmpeg,zzhhui/AndroidFFmpeg,hank5000/VPlayer_lib,matthewn4444/VPlayer_lib,mondoktamas/AndroidFFmpeg,guoyuqing/ffmpeg,ShawnKoo/AndroidFFmpeg,zzhhui/AndroidFFmpeg,mondoktamas/AndroidFFmpeg,lulufei/AndroidFFmpeg,shakin/AndroidFFmpeg,shine-chen/AndroidFFmpeg-with-RTMP,mrduongnv/AndroidFFmpeg,matthewn4444/VPlayer_lib,hank5000/VPlayer_lib,kyawkyaw/AndroidFFmpeg,mobdim/AndroidFFmpeg,sitexa/AndroidFFmpeg,code-guru/AndroidFFmpeg-appunite,lulufei/AndroidFFmpeg,mondoktamas/AndroidFFmpeg,sitexa/AndroidFFmpeg,guoyuqing/ffmpeg,xinran505982/AndroidVideoPlayer-master,zzhhui/AndroidFFmpeg,shine-chen/AndroidFFmpeg-with-RTMP,MisterRager/AndroidFFmpeg,matthewn4444/VPlayer_lib,QDPeng/AndroidFFmpeg,lulufei/AndroidFFmpeg,lulufei/AndroidFFmpeg,guoyuqing/ffmpeg,boke/AndroidFFmpeg,MisterRager/AndroidFFmpeg,q273255702/AndroidFFmpeg,guoyuqing/ffmpeg,xinran505982/AndroidVideoPlayer-master,mobdim/AndroidFFmpeg