[mingw-w64-llvm] update to 19.1.x

[gitoss]

Package name

mingw-w64-llvm

New version number

19.1.x

Other information that may be useful

LLVM is currently on 18.x on clang64, but 19.1.0 has been released, 19.1.1 is scheduled for October 1st.

https://discourse.llvm.org/t/llvm-19-1-0-released/81285

Is there a specific policy to wait for some minor releases to make sure a new major version is mature, or is a release for MSYS2 simply a matter of work load?

Are you willing to submit a PR?

Nope, updating the compiler toolchain way over my head

[ognevny]

llvm update requires reverse dependencies to be rebuilt as they link to llvm shared libraries. every major update introduces changes that will (in most cases) make code not compatible with newer versions

[lazka]

@MehdiChinoune just wondering: do you have any plans for updating llvm, or do you mind/prefer someone else doing it?