[RFA] Use gdb::byte_vector when reading section data

[Simon Marchi]

On 2018-03-11 22:44, Tom Tromey wrote:
> Simon> LGTM too, though in arm-tdep.c, I would suggest getting rid of 
> the
> Simon> exidx_size and extab_size variables, and to use the 
> std::vector::size
> Simon> instead.
> 
> How about this?
> 
> Tom

LGTM, thanks!