Build static library on macOS

[nazar-pc]

Linking to framework was easy (even though I'm not sure if that is recommended way, I know there is also a way to specify attribute like #[link(name = "CoreFoundation", kind = "framework")].

For libxml2 something is messed up. I tried installing and using it via brew, but that didn't seem to work. No idea if libxml2 is guaranteed to exist on every macOS installation, but it definitely works at least on some systems.

My understanding is that either autotools integration is incomplete that requires these additional steps or C libraries are a pain to deal with in general, also both can be true at the same time.

Either way, it seems to work and pass CI.

Fixes https://github.com/HadrienG2/hwlocality/issues/31

[semanticdiff-com[bot]]

Review changes with SemanticDiff.

Analyzed 1 of 2 files.

	Filename	Status
:grey_question:	hwlocality-sys/Cargo.toml	Unsupported file format
:heavy_check_mark:	hwlocality-sys/build.rs	Analyzed

[nazar-pc]

Let me know if I should do a version bump here

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (e6908e3) 65.81% compared to head (bc0989d) 66.97%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #90 +/- ## ========================================== + Coverage 65.81% 66.97% +1.16% ========================================== Files 43 42 -1 Lines 4599 4055 -544 ========================================== - Hits 3027 2716 -311 + Misses 1572 1339 -233 ``` | [Flag](https://app.codecov.io/gh/HadrienG2/hwlocality/pull/90/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.) | Coverage Δ | | |---|---|---| | [ubuntu-latest](https://app.codecov.io/gh/HadrienG2/hwlocality/pull/90/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.) | `66.97% <ø> (ø)` | | | [windows-latest](https://app.codecov.io/gh/HadrienG2/hwlocality/pull/90/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.) | `?` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.#carryforward-flags-in-the-pull-request-comment) to find out more.

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[HadrienG2]

Please bump the patch version if you want a tag right now, otherwise I'll bundle this up with other updates.

[HadrienG2]

Tag is up!