fix silent failure on Windows builds (#16984)
Summary:
Closes #16983
Remove backticks that are being interpreted by the shell. Add -e option to bash script to avoid future such failures
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16984
Reviewed By: yf225
Differential Revision: D14039128
Pulled By: kostmo
fbshipit-source-id: c31a1895377ca86c1b59e79351843cc8c4fd7de3
