This was a mistake originally for two reasons:
* The only device to use ELF as a deliverable is the altos devices
* ELF has nothing to do with the DFU specification
This moves the code to where it belongs.
My compiler doesn't understand -Wno-discard-qualifiers so drop it and
fix the warnings instead. I think it is better to explicitly fix them
anyways instead of just to ignore the discarded const qualifier in
general.
I think the option should be avoided in hand-written code. The warning
is there for a reason: To protect you from possibly overwriting data you
expect to not be modified when passing pointers around.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41215
