- Using EFI Shell Protocol. These functions do not make much sense
  unless a shell is present.
- Return the exe dir in case shell protocol is missing.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>

Some float methods are now `const fn` under the `const_float_methods` feature gate.

In order to support `min`, `max`, `abs` and `copysign`, the implementation of some intrinsics had to be moved from Miri to rustc_const_eval.

Signed-off-by: Emmanuel Ferdman <emmanuelferdman@gmail.com>

To fix the linker errors, we need to set the output extension to `.js` instead
of `.wasm`. Setting the output to a `.wasm` file puts Emscripten into standalone
mode which is effectively a distinct target. We need to set the runner to be
`node` as well.

This fixes most of the ui tests. I fixed a few more tests with simple problems:
- `intrinsics/intrinsic-alignment.rs` and `structs-enums/rec-align-u64.rs` --
Two `#[cfg]` macros match for Emscripten so we got a duplicate definition of
`mod m`.
- `issues/issue-12699.rs` -- Seems to hang so I disabled it
- `process/process-sigpipe.rs` -- Not expected to work on Emscripten so I
disabled it

uefi: Implement getcwd and chdir

- Using EFI Shell Protocol. These functions do not make much sense unless a shell is present.
- Return the exe dir in case shell protocol is missing.

r? `@joboet`

…alfJung,tgross35

Make some float methods unstable `const fn`

Some float methods are now `const fn` under the `const_float_methods` feature gate.

I also made some unstable methods `const fn`, keeping their constness under their respective feature gate.

In order to support `min`, `max`, `abs` and `copysign`, the implementation of some intrinsics had to be moved from Miri to rustc_const_eval (cc `@RalfJung).`

Tracking issue: rust-lang#130843

```rust
impl <float> {
    // #[feature(const_float_methods)]
    pub const fn recip(self) -> Self;
    pub const fn to_degrees(self) -> Self;
    pub const fn to_radians(self) -> Self;
    pub const fn max(self, other: Self) -> Self;
    pub const fn min(self, other: Self) -> Self;
    pub const fn clamp(self, min: Self, max: Self) -> Self;
    pub const fn abs(self) -> Self;
    pub const fn signum(self) -> Self;
    pub const fn copysign(self, sign: Self) -> Self;

    // #[feature(float_minimum_maximum)]
    pub const fn maximum(self, other: Self) -> Self;
    pub const fn minimum(self, other: Self) -> Self;

    // Only f16/f128 (f32/f64 already const)
    pub const fn is_sign_positive(self) -> bool;
    pub const fn is_sign_negative(self) -> bool;
    pub const fn next_up(self) -> Self;
    pub const fn next_down(self) -> Self;
}
```

r? libs-api

try-job: dist-s390x-linux

rename RcBox to RcInner for consistency

Arc uses ArcInner too (created in collaboration with `@aDotInTheVoid` and `@WaffleLapkin` )

…-unimplemented, r=lcnr

Don't report `on_unimplemented` message for negative traits

Kinda useless change but it was affecting my ability to read error messages when experimenting with negative bounds.

…ieyouxu

Fix most ui tests on emscripten target

To fix the linker errors, we need to set the output extension to `.js` instead of `.wasm`. Setting the output to a `.wasm` file puts Emscripten into standalone mode which is effectively a distinct target. We need to set the runner to be `node` as well.

This fixes most of the ui tests. I fixed 4 additional tests with simple problems:

- `intrinsics/intrinsic-alignment.rs` -- Two `#[cfg]` macros match for Emscripten so we got duplicate definition
- `structs-enums/rec-align-u64.rs` -- same problem
- `issues/issue-12699.rs` -- hangs so I disabled it
- `process/process-sigpipe.rs` -- Not expected to work on Emscripten so I disabled it

Resolves rust-lang#131666.

There are 7 more failing tests. I'll try to investigate more and see if I can fix them or at least understand why they happen.

- abi/numbers-arithmetic/return-float.rs (problem with [wasm treatment of noncanonical floats](https://webassembly.github.io/spec/core/exec/numerics.html#nan-propagation)?)
- async-await/issue-60709.rs -- linker error related to memcpy. Possible Emscripten bug?
- backtrace/dylib-dep.rs -- Says "Not supported"
- backtrace/line-tables-only.rs -- Says "Not supported"
- no_std/no-std-unwind-binary.rs -- compiler says `error: lang item required, but not found: eh_catch_typeinfo`
- structs-enums/enum-rec/issue-17431-6.rs -- One of the two compiler errors is missing
- test-attrs/test-passed.rs

    r?workingjubilee r?jieyouxu

…rgs, r=jieyouxu

Fix uninlined_format_args in stable_mir

Hi,

This PR fixes some clippy warnings

```
warning: variables can be used directly in the `format!` string
   --> compiler/stable_mir/src/mir/pretty.rs:362:13
    |
362 |             write!(writer, "{kind}{:?}", place)
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args
    = note: requested on the command line with `-W clippy::uninlined-format-args`
help: change this to
    |
362 -             write!(writer, "{kind}{:?}", place)
362 +             write!(writer, "{kind}{place:?}")
    |
```

Best regards,
Michal

Update `arm64e-apple-tvos` maintainer

# PR Summary
Small PR - Updates the correct `arm64e-apple-tvos` maintainer.