systemd-fsck: fix systemd-fsck/fsck pipe bad closure

systemd-fsck: fix systemd-fsck/fsck pipe bad closure

Currently, when console is disabled but progress is tracked, pipe opened
for communication between systemd-fsck and fsck may be closed
inadvertently (when opening of /dev/console return in error). That lead
to finish fsck prematurely (because it receives a SIGPIPE) and so fsck
may not check correctly filesystems and do not have time to fix memory
corruptions.

This commit changes the opening of /dev/console to be done previously to
pipe creation and so fix the bug described just above.