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2e5989e814
Previously by default, when not using `--ifc=`, lld would not deduplicate string literals. This reveals reliance on undefined behavior where string literal addresses are compared instead of using string equality checks. While ideally you would be able to easily identify and eliminate the reliance on this UB, this can be difficult, especially for third party code, and increases the friction and risk of users migrating to lld. This flips the default to deduplicate strings unless `--no-deduplicate-strings` is passed, matching ld64's behavior. Differential Revision: https://reviews.llvm.org/D140517