before this change, an incorrect profile would result in the following error:

```sh
...
...
  File "/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/bootstrap.py", line 1088, in bootstrap
    with open(include_path) as included_toml:
         ^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/defaults/config.aaaa.toml'
```

with this change, the error message is now:

```sh
...
...
  File "/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/bootstrap.py", line 1088, in bootstrap
    raise Exception("Unrecognized profile '{}'. Check src/bootstrap/defaults"
Exception: Unrecognized profile 'aaaa'. Check src/bootstrap/defaults for available options.
```

Signed-off-by: onur-ozkan <[email protected]>

LLVM at HEAD now emits `or disjoint`: https://buildkite.com/llvm-project/rust-llvm-integrate-prototype/builds/24076#018c1596-8153-488e-b622-951266a02f6c/741-774

Add missing period in `std::process::Command` docs

unify read_to_end and io::copy impls for reading into a Vec

This ports over the initial probe (to avoid allocation) and the dynamic read sizing from the io::copy specialization to the `default_read_to_end` implementation which already had its own optimizations for different cases.

I think it should be a best-of-both now.

suggested by `@a1phyr` in rust-lang#117576 (comment)

…ect-profiles, r=clubby789

give dev-friendly error message for incorrect config profiles

before this change, an incorrect profile would result in the following error:

```sh
...
...
  File "/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/bootstrap.py", line 1088, in bootstrap
    with open(include_path) as included_toml:
         ^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/defaults/config.aaaa.toml'
```

with this change, the error message is now:

```sh
...
...
  File "/home/nimda/devspace/onur-ozkan/rust/src/bootstrap/bootstrap.py", line 1088, in bootstrap
    raise Exception("Unrecognized profile '{}'. Check src/bootstrap/defaults"
Exception: Unrecognized profile 'aaaa'. Check src/bootstrap/defaults for available options.
```

…o-wasm, r=petrochenkov

Perform LTO optimisations with wasm-ld + -Clinker-plugin-lto

Fixes (partially) rust-lang#60059. Technically, `--target wasm32-unknown-unknown -Clinker-plugin-lto` would complete without errors before, but it was not producing optimized code. At least, it may have been but it was probably not the opt-level people intended.

Similarly to rust-lang#118377, this could benefit from a warning about using an explicit libLTO path with LLD, which will ignore it and use its internal LLVM. Especially given we always use lld on wasm targets. I left the code open to that possibility rather than making it perfectly neat.

Clean dead codes in miri

Detected by rust-lang#118257

update test for new LLVM 18 codegen

LLVM at HEAD now emits `or disjoint`: https://buildkite.com/llvm-project/rust-llvm-integrate-prototype/builds/24076#018c1596-8153-488e-b622-951266a02f6c/741-774