[WebAssembly][lld] symbol override with dynamic-linking doesn't work

[yamt]

see the description and code in https://github.com/yamt/garbage/tree/master/c/shlib_override

it's problematic because it prevents some common usages like malloc replacement. https://www.gnu.org/software/libc/manual/html_node/Replacing-malloc.html

[llvmbot]

@llvm/issue-subscribers-lld-wasm

Author: YAMAMOTO Takashi (yamt)

see the description and code in https://github.com/yamt/garbage/tree/master/c/shlib_override

it's problematic because it prevents some common usages like malloc replacement. https://www.gnu.org/software/libc/manual/html_node/Replacing-malloc.html