[PATCH] Revert "Auto merge of #79547 - erikdesjardins:byval, r=nagisa"

This reverts commit a094ff9590b83c8f94d898f92c2964a5803ded06, reversing
changes made to d37afad0cc87bf709ad10c85319296ac53030f03.

See https://github.com/rust-lang/rust/issues/80810 for more background

Gbp-Pq: Name 0001-Revert-Auto-merge-of-79547.patch

u-fix-self-bootstrap

Gbp-Pq: Name u-fix-self-bootstrap.patch

[PATCH] bootstrap: Disable initial-exec TLS model on powerpc

Fixes #81334.

Gbp-Pq: Name u-85807.patch

rustc (1.51.0+dfsg1-1) unstable; urgency=medium

  * Upload to unstable.
  * Install the rust-llvm-dwp symlink.
  * Bump ppc64 allowed-failures to 24.

[dgit import unpatched rustc 1.51.0+dfsg1-1]

Import rustc_1.51.0+dfsg1-1.debian.tar.xz

[dgit import tarball rustc 1.51.0+dfsg1-1 rustc_1.51.0+dfsg1-1.debian.tar.xz]

Import rustc_1.51.0+dfsg1.orig.tar.xz

[dgit import orig rustc_1.51.0+dfsg1.orig.tar.xz]