[llvm] [ADT] Introduce bind_{front, back}, [not_]equal_to (PR #175056)

[Jakub Kuderski via llvm-commits]

kuhar wrote:

> hi, looks like this broke c++20 build bots, can you fix forward or revert https://lab.llvm.org/buildbot/#/builders/108/builds/21813 ?

Fixed in https://github.com/llvm/llvm-project/commit/07ce80ee2ab96dc82386adfa99b308d75a4dc874

https://github.com/llvm/llvm-project/pull/175056