[FR] use `-Bsymbolic-non-weak-functions` by default if it lands?

https://reviews.llvm.org/D102570

This sounds like our ideal behavior:

* C++ specified behavior for new/delete are preserved because they're weak
* Smaller code size thanks to fewer relocations
* No interposition by default, opt-in per symbol by making the symbol weak

If and when that lands we should probably make that the default for Android.

Start with the linked LLVM review D102570 and confirm whether `-Bsymbolic-non-weak-functions` has landed. Then locate where Android NDK linker defaults are configured; done means the flag is enabled by default for Android while weak new/delete behavior remains preserved.

Written by the indexing model from the issue text.