Commit: readelf: warn about local symbols outside of a mergeable section

[Nick Clifton]

Hi Alan,

>> Thanks for this.  I will go ahead and apply this change, along with
>> my fix for avoiding mapping symbols.
> 
> Do you really need to exclude mapping symbols?  That just looks wrong
> to me.

I thought so too, but they were showing up in linker tests on AArch64 native
builds so I added the check.

Besides, what exactly does it mean for mapping symbols to be assigned to a
mergeable section ?  Is there any case where you would find both code and
data in such a section ?   I could not think of any scenario for this, but
since it does happen I assumed that I was just missing something and so
added the code to skip that kind of symbol.

Cheers
   Nick