[PATCH] remove target_os

[Robert Millan]

Hi,

Based on the description of host/target triplets in configure.ac:

dnl   build  -- the environment for building GRUB
dnl   host   -- the environment for running utilities
dnl   target -- the environment for running GRUB

it seems that target_os is an oxymoron.  There's no OS in the environment
where GRUB will run (well, there's the firmware, but we already use
target_vendor for that, and _os has a well-defined meaning).

Attached patch fixes that by supressing all references to target_os, and
replacing them with host_os where suitable.

Christian: since this mostly affects Cygwin, could you verify that it doesn't
cause breakage before I commit it?

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

target_os.diff
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