Fix `__cxa_throw` and `__cxa_rethrow` entries

[kammce]

For some reason, the exception index entries for both of these functions comes up as CANNOTUNWIND which isn't true. It may be a quirk with using extern "C"? Will need to investigate. This will allow us to remove the manual unwinding we do currently.

[kammce]

Maybe this has been failing because I never used the __wrap___cxa_throw and instead used the original unwrapped name 🤔

[kammce]

Resolved in #52 . Basically the compiler doesn't see a pathway for an exception to be thrown from __cxa_throw, so we need to add a dummy throw in there just to convince the compiler. I bet there is probably some way to mark a function as exception throwing outside of noexcept(false) that would work, but this works for now. Maybe in the future we will remove that code. But for now, I'll leave it be. Happy to have this bug fixed because it was a pain in the ass to have to read the disassembly each time and write the code to manually unwind the frame for each build type. It did feel cool doing it though.