this would fix undefined symbol errors by making it clear these functions are imported. references:e2c698c7e8/llvm/lib/MC/WasmObjectWriter.cpp (L1798-L1799)e2c698c7e8/llvm/lib/Object/WasmObjectFile.cpp (L749-L752)e2c698c7e8/lld/wasm/Symbols.cpp (L203)e2c698c7e8/lld/wasm/Relocations.cpp (L36-L40)