K 10
svn:author
V 5
tobik
K 8
svn:date
V 27
2021-03-23T06:39:47.866918Z
K 7
svn:log
V 733
lang/rust: Fix DOCS build, unbreak RUST_BACKTRACE

- Fix DOCS build by disabling deny-warnings (rustc equivalent to
  -Werror).  Let's not fail the entire build just because a handful
  of docs fail to build due to -D broken-intra-doc-links [0]
- Only install the host target docs.  We otherwise waste time with
  a rust-docs install-uninstall-install cycle for each additional
  target during stage.
- Backport FreeBSD support for gimli, unbreak RUST_BACKTRACE, and
  have useful stack traces with actual content again [1]
- While here also strip binaries under libexec/ and ack reading of
  src/bootstrap/CHANGELOG.md (changelog-seen=2)

[0] https://github.com/rust-lang/rust/issues/76526

PR:		253557 [1]
Submitted by:	jbeich [1]

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