Add shellprocess for i386 multiarch
Summary:
Add shellprocess to enable i386.
Bump Standards-Version to 4.5.0.
This provides "plan B" to T143
Test Plan:
- Boot live media
- Try to install Steam in Discover and it should fail with "dependency resolution failed"
- Install Lubuntu
- Reboot
- dpkg --print-foreign-architectures returns i386
- Install Steam in Discover and it should just work
Reviewers: wxl, tsimonq2
Reviewed By: wxl
Differential Revision: https://phab.lubuntu.me/D75