[llvm] [BPF] fix print_btf.py test script on bigendian machines (PR #110332)

[via llvm-commits]

yonghong-song wrote:

Thanks @eddyz87 fixing the issue. I don't think the test failure is due to this patch. Maybe rebase on top of main branch and try again.

https://github.com/llvm/llvm-project/pull/110332