[llvm] [Github][libc] Add qemu-system-hexagon to the libc container (PR #219433)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 commented:

In terms of size I guess an extra 75M isn't ideal but won't be the end of the world.

https://github.com/llvm/llvm-project/pull/219433