…uwer

Rollup of 11 pull requests

Successful merges:

 - #154654 (Move `std::io::ErrorKind` to `core::io`)
 - #145270 (Fix an ICE observed with an explicit tail-call in a default trait method)
 - #154895 (borrowck: Apply `user_arg_index` nomenclature more broadly)
 - #155213 (resolve: Make sure visibilities of import declarations make sense)
 - #155346 (`single_use_lifetimes`: respect `anonymous_lifetime_in_impl_trait`)
 - #155517 (Add a test for Mach-O `#[link_section]` API inherited from LLVM)
 - #155549 (Remove some unnecessary lifetimes.)
 - #154248 (resolve :  mark repr_simd as internal)
 - #154772 (slightly optimize the `non-camel-case-types` lint)
 - #155541 (Add `#[rust_analyzer::prefer_underscore_import]` to the traits in `rustc_type_ir::inherent`)
 - #155544 (bootstrap: Make "detected modifications" for download-rustc less verbose)

Rollup merge of #155517 - madsmtm:test-macho-link-section-attrs, r=bjorn3

Add a test for Mach-O `#[link_section]` API inherited from LLVM

The format of the `#[link_section]` attribute is under-documented, but on Mach-O, I think it's roughly the following BNF:
```
LinkSection -> Segment `,` Section (`,` (SectionType (`,` (SectionAttributes)?)?)?)?
Segment -> <0 to 16 bytes>
Section -> <0 to 16 bytes>
SectionType -> `regular` | `zerofill` | `cstring_literals` | `4byte_literals` | `8byte_literals` | `literal_pointers` | `non_lazy_symbol_pointers` | `lazy_symbol_pointers` | `symbol_stubs` | `mod_init_funcs` | `mod_term_funcs` | `coalesced` | `interposing` | `16byte_literals` | `thread_local_regular` | `thread_local_zerofill` | `thread_local_variables` | `thread_local_variable_pointers` | `thread_local_init_function_pointers`
SectionAttributes -> SectionAttribute (`+` SectionAttribute)*
SectionAttribute -> `pure_instructions` | `no_toc` | `strip_static_syms` | `no_dead_strip` | `live_support`, `self_modifying_code` | `debug`
```

This PR adds a small test for a little part of this.

Once #154429 is resolved, this should make it possible to test rust-lang/rustc_codegen_cranelift#1648 end-to-end.

r? bjorn3

…uwer

Rollup of 11 pull requests

Successful merges:

 - rust-lang/rust#154654 (Move `std::io::ErrorKind` to `core::io`)
 - rust-lang/rust#145270 (Fix an ICE observed with an explicit tail-call in a default trait method)
 - rust-lang/rust#154895 (borrowck: Apply `user_arg_index` nomenclature more broadly)
 - rust-lang/rust#155213 (resolve: Make sure visibilities of import declarations make sense)
 - rust-lang/rust#155346 (`single_use_lifetimes`: respect `anonymous_lifetime_in_impl_trait`)
 - rust-lang/rust#155517 (Add a test for Mach-O `#[link_section]` API inherited from LLVM)
 - rust-lang/rust#155549 (Remove some unnecessary lifetimes.)
 - rust-lang/rust#154248 (resolve :  mark repr_simd as internal)
 - rust-lang/rust#154772 (slightly optimize the `non-camel-case-types` lint)
 - rust-lang/rust#155541 (Add `#[rust_analyzer::prefer_underscore_import]` to the traits in `rustc_type_ir::inherent`)
 - rust-lang/rust#155544 (bootstrap: Make "detected modifications" for download-rustc less verbose)