[clang] [compiler-rt] Change compiler-rt lib search path for Hexagon-linux (PR #154530)

[Brian Cain via cfe-commits]

androm3da wrote:

> @androm3da do we need separate builtins for G0 / pic / hexagon version(v68,v69,...) ?

I don't think we "need" it.  But if it's desired, it can be added.

If you decide to do that, you might want to consider the (flatter) multilibs layout used by other toolchains.

https://github.com/llvm/llvm-project/pull/154530