[llvm] [offload][omp] link libomptarget against liboffload (PR #221730)

[Alex Duran via llvm-commits]

adurang wrote:

> We'll see if this breaks anything I guess

I did my best to test the changes... but i'll be checking to revert in case something happens. Thanks!

https://github.com/llvm/llvm-project/pull/221730