[compiler-rt] [ctx_profile] Integration test (PR #92456)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

> > > I'm going to try to find a simpler reproducer.
> > 
> > 
> > Thanks - I want to make sure I understand what substitutions to add (likely that's what I need to do in the lit.config.py)
> 
> Ok, could you try if you can reproduce if you do a monorepo build with:
> 
> ```
> cmake -G Ninja <source>/llvm -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_CCACHE_BUILD=ON -DLLVM_TARGETS_TO_BUILD=host -DLLVM_ENABLE_PROJECTS='clang;compiler-rt' -DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF
> ```
> 
> (`-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF` should be the key option, the rest is just my "quick build" defaults)

`ninja check-ctx_profile` works with PR #92679 applied.

https://github.com/llvm/llvm-project/pull/92456