[PATCH] Check for asm support in UI tests that require it

Add `needs-asm-support` compiletest directive, and use it in asm tests
that require asm support without relying on any architecture specific
features.

Gbp-Pq: Name u-84099.patch

[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-mozilla (1.51.0+dfsg1-1~deb11u1) bullseye; urgency=medium

  * Non-maintainer upload.
  * Backport to bullseye.
  * stage0 build.
    + Use arm-unknown-linux-gnueabi target for armel.
  * Reduce debugging symbols on i386 to avoid FTBFS due to OOM.

[dgit import unpatched rustc-mozilla 1.51.0+dfsg1-1~deb11u1]

Import rustc-mozilla_1.51.0+dfsg1-1~deb11u1.debian.tar.xz

[dgit import tarball rustc-mozilla 1.51.0+dfsg1-1~deb11u1 rustc-mozilla_1.51.0+dfsg1-1~deb11u1.debian.tar.xz]

Import rustc-mozilla_1.51.0+dfsg1.orig.tar.xz

[dgit import orig rustc-mozilla_1.51.0+dfsg1.orig.tar.xz]

Import rustc-mozilla_1.51.0+dfsg1.orig-stage0.tar.xz

[dgit import orig rustc-mozilla_1.51.0+dfsg1.orig-stage0.tar.xz]