Auto merge of #134296 - matthiaskrgr:rollup-o0sxozj, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #132150 (Fix powerpc64 big-endian FreeBSD ABI)
 - #133942 (Clarify how to use `black_box()`)
 - #134081 (Try to evaluate constants in legacy mangling)
 - #134192 (Remove `Lexer`'s dependency on `Parser`.)
 - #134208 (coverage: Tidy up creation of covmap and covfun records)
 - #134211 (On Neutrino QNX, reduce the need to set archiver via environment variables)

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