[clang] [InstallAPI] Capture & compare load commands that may differ per arch slice (PR #87674)

[Cyndy Ishida via cfe-commits]

cyndyishida wrote:

> It looks like this is causing failures on the reverse-iteration buildbot (https://lab.llvm.org/buildbot/#/builders/54/builds/9683)

Thanks for the heads up, should be fixed by https://github.com/llvm/llvm-project/pull/89270

https://github.com/llvm/llvm-project/pull/87674