Add fsck to images

• Add options to kernel command line fsck.mode=auto and fsck.repair=yes to allow file system check by initramfs script.
• Add fsck utilities for ostree-based rootfs check

added 5 commits

• 8986f3a7...208150ef - 2 commits from branch apertis/v2019dev0
• 2ae0cd08 - Enable rootfs check during boot time
• a929bd7f - Remove incorrect 'flags' option
• 19535f72 - Add utilities for ostree-based rootfs check

Compare with previous version

added 5 commits

• 19535f72...b120a6b3 - 2 commits from branch apertis/v2019dev0
• 93fa2e8b - Enable rootfs check during boot time
• d0a64760 - Remove incorrect 'flags' option
• 69c0b378 - Add utilities for ostree-based rootfs check

Compare with previous version

added 4 commits

• f3e30896 - 1 commit from branch apertis/v2019dev0
• c1a4bce2 - Enable rootfs check during boot time
• 690bd233 - Remove incorrect 'flags' option
• d43391d2 - Add utilities for ostree-based rootfs check

Compare with previous version

added 5 commits

• d43391d2...6a6b34d3 - 2 commits from branch apertis/v2019dev0
• 267bb208 - Enable rootfs check during boot time
• db49314f - Remove incorrect 'flags' option
• b9d8ccd9 - Add utilities for ostree-based rootfs check

Compare with previous version

merged