package/e2fsprogs: fix fsck when using systemd

package/e2fsprogs: fix fsck when using systemd

Commit a93fc34 modified e2fsprogs to symlink /usr/sbin/fsck to /sbin/fsck
to keep systemd happy.  However, later on commit c5bd8af6 has forced
/usr/sbin to be a symlink to /sbin when using systemd.  This means fsck
gets destroyed as a symlink to itself when using systemd or when setting
BR2_ROOTFS_MERGED_USR.

Since commit c5bd8af6 obsoletes commit a93fc34 revert the changes from
commit a93fc34 to solve the issue.

Signed-off-by: Martin Bark <martin@barkynet.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>