[clang] [clang][ssaf] Implement JSONFormat (PR #180021)

[Jan Patrick Lehr via cfe-commits]

jplehr wrote:

> LLVM Buildbot has detected a new failure on builder `openmp-offload-sles-build-only` running on `rocm-worker-hw-04-sles` while building `clang` at step 5 "compile-openmp".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/140/builds/38765
> 
> Here is the relevant piece of the build log for the reference

This buildbot is running sles 15 and its default GCC 7.5. I don't know if that is the issue here, but maybe it's just a matter of the compiler version. According to docs LLVM should still support it (gcc 7.4 and newer).
Appreciate some help looking into this!

https://github.com/llvm/llvm-project/pull/180021