Stop using shell=True in subprocess

Change-Id: Iefd0a4942c16d9aee44cfe61c746083c2e2bd3b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2099446
Tested-by: Allen Li <ayatane@chromium.org>
Auto-Submit: Allen Li <ayatane@chromium.org>
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
1 file changed