Auto merge of #138450 - matthiaskrgr:rollup-4im25vf, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #137816 (attempt to support `BinaryFormat::Xcoff` in `naked_asm!`)
 - #138109 (make precise capturing args in rustdoc Json typed)
 - #138343 (Enable `f16` tests for `powf`)
 - #138356 (bump libc to 0.2.171 to fix xous)
 - #138371 (Update compiletest's `has_asm_support` to match rustc)
 - #138404 (Cleanup sysroot locating a bit)

r? `@ghost`
`@rustbot` modify labels: rollup