Auto merge of #124072 - saethlin:less-sysroot-libc-misc, r=jieyouxu

Remove libc from more tests

The goal here is to trim down the number of tests that depend on libc from the sysroot to make rust-lang/rust#123938 more plausible.

This PR is a few simple cases that I missed in rust-lang/rust#123943.

Author: bors