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

gdb: fix musl patch.
https://github.com/void-linux/void-packages/pull/29419

Description:
Use patch from Alpine. __SIGRTMIN and SIGRTMIN aren't the same thing:
SIGRTMIN is for signals applications can use, for which musl currently
returns 35, but __SIGRTMIN is supposed to include the signals that libc
uses, where the correct value is 32.

We also extend their patch to include the nostop changes from void,
though they don't seem to be explicitly doing something.

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#### Have the results of the proposed changes been tested?
- [ ] 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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