llvm-project

53c237c0 - [lld][COFF] Use `.contains` rather than `.count` for set membership. NFC (#177067)

[lld][COFF] Use `.contains` rather than `.count` for set membership. NFC (#177067) Also converted a couple of `std::set` to `llvm::StringSet`/`llvm::SmallSet`. This matches the usage in the other linker backends. See #176610