[clang] [compiler-rt] [rtsan][clang] Add Hexagon support for RTSan (PR #200313)

[Chris Apple via cfe-commits]

cjappl wrote:

> > > Makes sense. I tested it using qemu-hexagon and if you would like me to document the process for the sake of the community I can do that.
> > 
> > 
> > I'd love to read/hear about this, just for my own curiosity!
> 
> https://github.com/androm3da/llvm-project/blob/7099d7de2b67a3b359cf7db9168f5f0d21d42472/compiler-rt/docs/RTSanHexagon.rst
> 
> Not sure if it makes sense to create a PR for this one -- the other architectures aren't covered similarly so it might be odd to have this one. Let me know what you'd prefer.

I think it's probably OK to leave it on this branch. I'll peruse when I get a chance. Thank you for writing it up! And thanks again for the contribution. 

https://github.com/llvm/llvm-project/pull/200313