[PATCH] Only typedef Ebl once.

[Mark Wielaard]

On Sun, 2020-07-19 at 22:03 +0200, Mark Wielaard wrote:
> Since commit 287a18452 libasm.h defines an opague Ebl handle.
> This is fine, except for (internal) code that also includes libebl.h.
> Since C11 having multiple typedefs for the same thing is fine, but we
> do build using GNU/C99. This also allows multiple same typedefs,
> except
> for (very) old GCCs.
> 
> This only affects internal code, since libebl.h isn't a public
> header.
> 
> For internal code, only add the typedef in libebl.h when libasm.h
> hasn't been included. Make sure all code that includes both headers
> includes libasm.h first.

Pushed to master.