Support fuzzing of out-of-tree builds (#3050)
Support fuzzing of out-of-tree builds (#3050)

Can now run scripts/fuzz_opt.py --binaryen-bin build/bin [opts...] to fuzz an
out-of-tree build

Handle positional arguments by looking at shared.requested (with options removed)
instead of raw sys.argv

WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen,WebAssembly/binaryen