[fbsync] Include dlls required for wheel building (#7590)

Reviewed By: vmoens

Differential Revision: D45903820

fbshipit-source-id: 67fc9ebc225e94ebf0892e7b282cb51ffbf8e3ae

Author: NicolasHug

packaging/pre_build_script.sh

@@ -23,6 +23,7 @@ if [[ "$(uname)" == Darwin || "$OSTYPE" == "msys" ]]; then
       cp "$bin_path/Library/bin/libjpeg.dll" torchvision
   fi
 
+else
   # Install native CentOS libJPEG, freetype and GnuTLS
   yum install -y libjpeg-turbo-devel freetype gnutls