Add mountroot.conf script for upstart that will re-mount root file system back as read-write.
Add mountroot.conf script for upstart that will re-mount root file system back as read-write.

This script is trying to achieve was initramfs / initrd usually does during boot process,
and re-mount the root file system back as read-write.  Why? Because Debian / Ubuntu based
containers have "unmountroot" init script that will re-mount read-only their root file system.

Signed-off-by: Krzysztof Wilczynski <9bf091559fc98493329f7d619638c79e91ccf029@linux.com>

kwilczynski/miscellaneous,kwilczynski/miscellaneous,kwilczynski/miscellaneous,kwilczynski/miscellaneous,kwilczynski/miscellaneous,kwilczynski/miscellaneous,kwilczynski/miscellaneous