[trivial][MERGE] Add more ignored files

[Alexander Belchenko]

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Martin Pool пишет:
> I like to run vim from inside the bzrlib directory and have the tags
> file there.  (Aside from anything else this keeps grep/ctags from
> looking in a build directory.)
> 
> This also ignores the built extension files.

Can you ignore extensions and on windows too?

+bzrlib/_*_c.pyd
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=Dbkt
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