[MERGE][0.15] Small updates for win32 support

[Alexander Belchenko]

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Aaron Bentley пишет:
> John Arbash Meinel wrote:
>> Alexander Belchenko wrote:
>>> John Arbash Meinel ?8H5B:
>>> Your patch introduce new fails during selftest like this:
>>> ERROR: #1106 test_revert.TestRevert.test_preserve_execute
>>>     <WorkingTree4 of C:/Temp/jam/test0000.tmp/1K/01106/work/tree> is not locked
>>> And there is still some LockError exists.
>>> Gzipped log attached.
> 
>> Well it seems a little weird to call WorkingTree.is_executable() when
>> you don't have a lock on the tree.
> 
> Where do we stand with this work?  It looks as though this version of
> the patch shouldn't be merged.  Is that right?

For me it's incomplete and not ready yet. Maybe John think different.

[µ]
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