[lld] [ELF] Align the end of PT_GNU_RELRO associated PT_LOAD to a common-page-size boundary (PR #66042)

[Peter Smith via llvm-commits]

https://github.com/smithp35 approved this pull request.

Thanks for the updates and clarification. Looks good to me now.

https://github.com/llvm/llvm-project/pull/66042