[Bug 1553678] [NEW] os-prober doesn't detect Windows properly with EFI and MBR partition

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https://anonscm.debian.org/cgit/d-i/os-prober.git/tree/os-
probes/mounted/x86/05efi#n42..n45

Disk has regular MBR table. It has Windows 7 and Ubuntu installed on
different partitions. Os-prober doesn't detect EFI partition on MBR
table because "udevadm info" returns "dos" partition scheme instead of
expected "msdos".

  $ udevadm info /dev/sda1 | grep  dos
  E: ID_PART_ENTRY_SCHEME=dos
  E: ID_PART_TABLE_TYPE=dos

  $ fdisk -lu /dev/sda | grep -B1 -A1 ef
     Device Boot      Start         End      Blocks   Id  System
  /dev/sda1   *        2048      616447      307200   ef  EFI (FAT-12/16/32)
  /dev/sda2          616448   128134439    63758996    7  HPFS/NTFS/exFAT

Fixing conditions below resolves the issue:

-		\( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != msdos \) -o \
+		\( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != dos \) -o \
		\( "$ID_PART_ENTRY_SCHEME" = gpt -a "$ID_PART_ENTRY_TYPE" != c12a7328-f81f-11d2-ba4b-00a0c93ec93b \) -o \
-		\( "$ID_PART_ENTRY_SCHEME" = msdos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then
+		\( "$ID_PART_ENTRY_SCHEME" = dos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then

** Affects: os-prober (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: efi mbr windows
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os-prober doesn't detect Windows properly with EFI and MBR partition
https://bugs.launchpad.net/bugs/1553678
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