brotli packages: security update

[Lemures Lemniscati via Cygwin-apps]

Hi!

Brotli 1.0.9 contains a security update, which fixes an "integer overflow" 
problem [1].

Please update it.


A cygport file for updating is placed at
  https://github.com/cygwin-lem/brotli-cygport/tree/n_1.0.9-1 .


Test packages generated from it are placed at
  https://cygwin-lem.github.io/brotli-cygport/ ,
or
  https://github.com/cygwin-lem/brotli-cygport/tree/n_1.0.9-1_gh-pages .


But the cygport file is not tested under Cygwin CI AppVeyor, yet.
So BUILD_REQUIRES in brotli.cygport might be insufficient. 


[1]: https://github.com/google/brotli/blob/master/README.md


Regards,

Lem

0001-brotli-1.0.9-cygport.patch
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