This is duplicated in a few locations throughout the sysroot to work
around issues with not exporting a macro in libstd but still wanting it
available to sysroot crates to define blocks. Nowadays though we can
simply depend on the `cfg-if` crate on crates.io, allowing us to use it
from there!

Once::new() has been a stable const fn for a while now.

Closes rust-lang#61746

Changes:
````
Fix wrong lifetime of TyCtxt
travis: Wait at most 30 minutes for base test
Typos and minor grammar corrections
Adds lint for integer division
redundant_closure_for_method_calls fixes: lint does not trigger when there is a difference in mutability lint does not trigger when the method belongs to a trait which is not implemebted directly (Deref)
Fix implicit_return docs
rustup https://github.com/rust-lang/rust/pull/61758/files
Remove wrong lifetime from LintContext
Workaround for rust-lang/rustfmt#3615
Fixing eta with respect to lazy evaluation.
````

Handle index out of bound errors during const eval without panic

Fix rust-lang#61595

…fackler

std: Remove internal definitions of `cfg_if!` macro

This is duplicated in a few locations throughout the sysroot to work
around issues with not exporting a macro in libstd but still wanting it
available to sysroot crates to define blocks. Nowadays though we can
simply depend on the `cfg-if` crate on crates.io, allowing us to use it
from there!

…xcrichton

Deprecate ONCE_INIT in future 1.38 release

Once::new() has been a stable const fn for a while now.

Closes rust-lang#61746

submodules: update clippy from c0dbd34 to bd33a97

Changes:
````
Fix implicit_return docs
rustup https://github.com/rust-lang/rust/pull/61758/files
Remove wrong lifetime from LintContext
Workaround for rust-lang/rustfmt#3615
Fixing eta with respect to lazy evaluation.
````
r? @oli-obk

…etrochenkov

Small cleanup in `check_pat_path`