ci: update musl headers to Linux 6.6

Update the musl headers in CI to use alpine-linux instead of sabotage-linux.
Alpine also uses musl but follows the linux stable releases, providing more up-to-da

ci: update musl headers to Linux 6.6

Update the musl headers in CI to use alpine-linux instead of sabotage-linux.
Alpine also uses musl but follows the linux stable releases, providing more up-to-date headers.

Signed-off-by: Pedro Tammela <[email protected]>

(backport <https://github.com/rust-lang/libc/pull/3921>)
(cherry picked from commit acc75e75f119483a56fb46e06951004e8cfa5594)

Signed-off-by: Trevor Gross <[email protected]>

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ci: Use `./` with shebangs rather than `sh` or `bash`

The scripts say how they should execute, there isn't any reason to
duplicate this wherever they are called.

(backport <https://github.com/rust-

ci: Use `./` with shebangs rather than `sh` or `bash`

The scripts say how they should execute, there isn't any reason to
duplicate this wherever they are called.

(backport <https://github.com/rust-lang/libc/pull/4124>)
(cherry picked from commit 4707c5db583477e83961eef1b40df2fe5e016fe4)

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ci: Change 32-bit Docker images to use EOL repos

(backport <https://github.com/rust-lang/libc/pull/4120>)
(cherry picked from commit 9830960c19c53b1527593413e0f55c8cfb067344)

Upgrade Docker images to Ubuntu 23.10

Update Docker image to Ubuntu 22.04

Signed-off-by: Yuki Okushi <[email protected]>

Add musl's lib folder to library search path

Prior to this change, `libc.a` was being found in rustc's self-contained
musl target folder instead of the `libc.a` that we've built or
downloaded. This

Add musl's lib folder to library search path

Prior to this change, `libc.a` was being found in rustc's self-contained
musl target folder instead of the `libc.a` that we've built or
downloaded. This doesn't seem to have caused any noticeable issues as the
versions of musl we built/installed and the version shipped in rustc's
target matched exactly.

To resolve this, we pass the path to our version of musl's lib folder
directly as a `RUSTFLAG` which causes it to be found first.

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Update Ubuntu images to 20.04

Update Ubuntu images to 19.10

Update MUSL Linux kernel headers and re-enable Linux tests

Updated most musl versions in CI docker setup.

Update Ubuntu images to 19.04

Upgrade bunch of EOL docker images to Ubuntu 18.04

Fix for rust-lang/rust issue #50583

Retry all curl operations

use new headers for musl build

Update musl ci jobs to 1.1.19

Add more Linux-based syscall tables

* Add syscall tables to most remaining arches in `src/unix/notbsd`
* Add aarch64/arm musl to CI
* Update dependencies