[File] magic-filesystems patch

[Vincent Mihalkovic]

Hi,

I'm trying to fix this bug -
https://bugzilla.redhat.com/show_bug.cgi?id=1696798. Problem is in
completely different output for two {aarch64,x86_64}*.iso files:
$ file Fedora-Server-netinst-*
Fedora-Server-netinst-aarch64-29-1.2.iso: ISO 9660 CD-ROM filesystem data
'Fedora-S-dvd-aarch64-29' (bootable)
Fedora-Server-netinst-x86_64-29-1.2.iso: DOS/MBR boot sector; partition 2 :
ID=0xef, start-CHS (0x3ff,254,63), end-CHS (0x3ff,254,63), startsector 196,
19960 sectors

I find out that due to intention mention in /magic/Magdir/filesystems; line
1996: "# to display CD-ROM (114=81+33) before MBR (113=40+72+1),
partition-table (71=50+21) and Apple Driver Map (51)" present situation is
that both DOS/MBR boot sector (/magic/Magdir/filesystems; line 266) and
CDROM (/magic/Magdir/filesystems; line 1998) has the same strength (115),
so by me proposed patch is increasing the CDROM strength.

Output after applied patch looks like this:
$ file Fedora-Server-netinst-*
Fedora-Server-netinst-aarch64-29-1.2.iso: ISO 9660 CD-ROM filesystem data
'Fedora-S-dvd-aarch64-29' (bootable)
Fedora-Server-netinst-x86_64-29-1.2.iso:  ISO 9660 CD-ROM filesystem data
(DOS/MBR boot sector) 'Fedora-S-dvd-x86_64-29' (bootable)

Regards,
vincent mihalkovic
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