Patch releases for older versions

[ZzEeKkAa]

Comment:

There are important changes backstream to older releases of llvm, like this: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/tree/llvm_release_140 . Unfortunately, they are not being released with a tag. So my question is what is the best approach to make those changes available in conda packages? There are some packages that rely on those changes, like intel-graphics-compiler

[ZzEeKkAa]

This is no longer blocker, after KhronosGroup/SPIRV-LLVM-Translator#2586 was merged. There are releases in https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases that will be automatically generated every month. Now we need to follow https://conda-forge.org/docs/maintainer/updating_pkgs/#maintaining-several-versions doc to create multiple branches. Before doing so, let's merge #25 first, no to backport those changes in the future

[ZzEeKkAa]

@isuruf do you know why bot did not open PR for the 15.X branch? There is new release v15.0.1: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v15.0.1