[osquery:experimental] 5 new commits by Alexander Kindyakov:

<https://github.com/facebook/osquery/commit/b93069b3f488c8b9389000538f8865dafedf23b8|b93069b>

Fix sign compare warning in file_compression.cpp - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/2a624f2f180c393edd2bf594c3934aab367d8e38|2a624f2>

Fix warning with constants initialisation in magic.cpp - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/a9b5309418612345da06aac114f050e474091026|a9b5309>

mute [c99-extensions] and [undeclared-selector] for macos system tables - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/76cc3eaf6656cf393378b2cc968a549568082f28|76cc3ea>

Mute signed-unsigned comparison warning for tests on macosx - Alexander Kindyakov

<https://github.com/facebook/osquery/commit/06633f2d1b284805feb1bf501a458d67c595e099|06633f2>

Fix unused variable warning in table integration test - Alexander Kindyakov