[FEATURE REQUEST] Allow to pass flags to Binaryen #1956
Description
Is your feature request related to a problem? Please describe.
To be able to link Wasm modules produced by Emscripten, one needs to --enable multimemory in Binaryen.
Describe the solution you'd like
It could be achieved by having a flag --binaryen-opt=<flags> passed to Binaryen invocations (possibly two distinct flags for compiling and linking).
Describe alternatives you've considered
An alternative solution would be to have an --enable-multimemory flag in wasm_of_ocaml directly, but it is more restricted and we might have to add several more such flags in the future.