ext4/018: Match the value of File ACL accurately

ext4/018: Match the value of File ACL accurately

Since e2fsprogs v1.44.0, debugfs with stat command shows the output:
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debugfs -R 'stat /attrfile' /dev/sda11 2> /dev/null | grep 'File ACL:'
File ACL: 9258
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Before e2fsprogs v1.44.0, debugfs with stat command shows the output:
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debugfs -R 'stat /attrfile' /dev/sda11 2> /dev/null | grep 'File ACL:'
File ACL: 9258    Directory ACL: 0
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"Directory ACL: XXXX" was removed by commit 578fcbf so running ext4/018
with older e2fsprogs(i.e. before v1.44.0) got the following error:
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+./tests/ext4/018: line 59: 9258    Directory ACL: 0: syntax error in expression (error token is "Directory ACL: 0")
--------------------------------------------------------------------------

we match the value of File ACL accurately to fix it.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>