Add an escape hatch for unknown LLD flags #163

Job	Run time
Build wasm-component-ld (x86_64-windows, windows-latest)	2m 15s
Build wasm-component-ld (x86_64-macos, macos-latest, x86_64-apple-darwin)	1m 5s
Rustfmt	16s
Test (windows-latest, stable)	1m 28s
Build wasm-component-ld (x86_64-linux, ubuntu-latest)	1m 33s
Test (ubuntu-latest, nightly)	37s
Test (macos-latest, stable)	32s
Build wasm-component-ld (aarch64-macos, macos-latest, aarch64-apple-darwin)	1m 10s
Test (ubuntu-latest, beta)	35s
Build MSRV	38s
Build wasm-component-ld (aarch64-linux, ubuntu-latest, aarch64-unknown-linux-gnu)	1m 42s
Test (ubuntu-latest, stable)	40s
Record the result of testing and building steps	2s
	12m 33s

Provide feedback