Auto merge of #133092 - madsmtm:bootstrap-deployment-target, r=Mark-Simulacrum,jieyouxu

Always set the deployment target when building std

`cc` has [a bug/feature](https://github.com/rust-lang/cc-rs/issues/1171) (I guess depending on how you look at it) where the default deployment target is taken from the SDK instead of from `rustc`. This causes `compiler-builtins` to build `compiler-rt` with the wrong deployment target on iOS.

I've been meaning to change how `cc` works in this regard, but that's a lengthy process, so let's fix it in bootstrap for now.

The behaviour can be seen locally with `./x build library --set build.optimized-compiler-builtins=true` for various target triples, and then inspecting with `otool -l build/host/stage1/lib/rustlib/*/lib/libcompiler_builtins-*.rlib | rg 'minos|version'`. I have added a rmake test that ensures that we now have the same version everywhere.

Fixes https://github.com/rust-lang/rust/issues/128419
Fixes https://github.com/rust-lang/compiler-builtins/issues/650
Fixes https://github.com/rust-lang/rust/issues/136523
See also https://github.com/rust-lang/cargo/issues/13115, https://github.com/rust-lang/cc-rs/issues/1171, https://github.com/rust-lang/rust/issues/136113
See https://github.com/rust-lang/rust/pull/133092#issuecomment-2626206772 for a description of how the change works.

try-job: i686-gnu-1
try-job: i686-gnu-2
try-job: x86_64-apple-1
try-job: aarch64-apple
try-job: dist-apple-various
try-job: dist-aarch64-apple
try-job: dist-various-2
try-job: x86_64-fuchsia

0 files changed, 0 insertions, 0 deletions