wasm-ld memory suggestions
HI,

Are there any suggestions for how to build wasm from LLVM bitcode using wasm-ld,  Specifically for the options:
```
-z stack-size=5242880 --initial-memory=16777216 --max-memory=16777216 --global-base=1024
```
?  There's only 64KB available, so I guess that's the obvious setting for inital-memory and max-memory, but I guess the others are whatever I want (within that limit)?