Qt 5.7.1 and seccomp sandbox #3163
Description
With Qt 5.7.1 on Archlinux, we get a renderer process crash loop with:
/home/qt/work/qt/qtwebengine/src/3rdparty/chromium/sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:seccomp-bpf failure in syscall 0281
This wasn't the case until some recent-ish (kernel?) update and works with Qt 5.8.
Passing --qt-flag disable-seccomp-filter-sandbox makes things work. If we have a method to check whether it's needed, we should probably pass it ourselves.