[clang] [llvm] [Offload] Add support for loongarch64 to host plugin (PR #120173)

[Lu Weining via llvm-commits]

SixWeining wrote:

> Is there the possibility to set up a buildbot for this architecture?

There is a [buildbot](https://lab.llvm.org/staging/#/builders/20) for loongarch, but it only run tests for clang and llvm-test-suite.

Do you mean adding a dedicate buildbot for the `offload` sub-project? I think the answer is yes. Actually we plan to setup more buildbots for any other sub-projects, including `flang`, `lld` and `openmp`, etc.

https://github.com/llvm/llvm-project/pull/120173