Add product_available to product available modules am: 4bf3db99cf am: 40dc74465d am: e927a57c4b am: d1143ff5b9

Original change: https://android-review.googlesource.com/c/platform/external/libunwind_llvm/+/1495857

Change-Id: I0fe370c44ced108bc5ba9590a6ee240e1a644afa