[clang] [clang][bytecode] Fix bit casts to IntAP types (PR #158509)

[David Spickett via cfe-commits]

DavidSpickett wrote:

The above failure is because the bot is 32-bit Armv8-a, I expect this would fail on x86 32-bit as well. I think you could use the lit feature `clang-target-64-bits` along with `%if{ ... }` to make the host triple line conditional. I don't completely understand what `clang-target-64-bits` implies though.

https://github.com/llvm/llvm-project/pull/158509