[llvm] [Offload] Lazily initialize platforms in the Offloading API (PR #163272)

[Nico Weber via llvm-commits]

nico wrote:

Any chance that this is causing http://45.33.8.238/macm1/115570/step_10.txt ?

Am I holding something wrong?

https://github.com/llvm/llvm-project/pull/163272