There's a closed pull request on the void-packages repository

mozc: update to 2.26.4472.100.
https://github.com/void-linux/void-packages/pull/32646

Description:
<!-- Mark items with [x] where applicable -->

#### General
- [ ] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

#### Have the results of the proposed changes been tested?
- [x] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [ ] I generally don't use the affected packages but briefly tested this PR

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---

This update contains, among other things, a fix for the bug [mozc#510](https://github.com/google/mozc/issues/510), which was disrupting the use of Anki.
`patches/unsigned-int.patch` is removed as the equivalent changes have now been incorporated into the upstream.