Add ElfSymbol::raw_symbol

[koute]

I'm switching one of my projects from goblin to object, and getting access to raw ELF fields having an ElfSymbol32/ElfSymbol64 seems... frustratingly impossible? Is there any particular reason why the Sym trait isn't just simply implemented for ElfSymbol32 and ElfSymbol64, like I've done here in this PR?

[philipc]

getting access to raw ELF fields having an ElfSymbol32/ElfSymbol64 seems... frustratingly impossible

Yep, this is an area that needs improvement, and I'm still not sure which path to take. So far I've been adding things like this ad-hoc as people need them, but it desperately needs to be systematically solved for the entire crate.

Is there any particular reason why the Sym trait isn't just simply implemented for ElfSymbol32 and ElfSymbol64

I'm reluctant to do that because the Sym trait is at a different level of abstraction from ElfSymbol32 and ElfSymbol64, and because this isn't a solution for the entire crate. To do this for the entire crate, we would need to add another method for every field of every raw type.

An alternative to this is to add fn undecided_name(&self) -> &'data Sym32 for ElfSymbol32, or something like that, and that's closer to what we've been doing so far.

[koute]

Okay, would something like this be better?

[koute]

Thanks!