[lld-macho,BalancedPartition] Simplify relocation hash and avoid xxHash#121729

MaskRay merged 3 commits intomainllvm/llvm-project:mainfrom

users/MaskRay/spr/lld-machobalancedpartition-simplify-relocation-hash-and-avoid-xxhashllvm/llvm-project:users/MaskRay/spr/lld-machobalancedpartition-simplify-relocation-hash-and-avoid-xxhashCopy head branch name to clipboard