Check a Linux ext4 file system before resizing 'primary' partition

Issues: MEN-2242

Changelog: Title

Signed-off-by: Adam Podogrocki <a.podogrocki@gmail.com>

convert-stage-3.sh

@@ -9,6 +9,8 @@ build_log=$output_dir/build.log
 
 sudo dd if=${output_dir}/rootfs.img of=/dev/mapper/${rootfs_mapping} bs=8M conv=sparse >> "$build_log" 2>&1
 sync
+
+sudo e2fsck -y -f /dev/mapper/${rootfs_mapping} >> "$build_log" 2>&1
 sudo resize2fs /dev/mapper/${rootfs_mapping} >> "$build_log" 2>&1
 # Check Linux ext4 file system just in case.
 sudo fsck.ext4 -fp /dev/mapper/${rootfs_mapping} >> "$build_log" 2>&1