[PATCH] configure.ac: allow expressing dwarf version in CFLAGS and CROSSCFLAGS

[Eric Pouech]

>
> I think that this will not work for PDBs: when CROSSCFLAGS="-g 
> -gcodeview", we'd try to append "-gdwarf-2 -gstrict-dwarf".

I thought you'd use CROSSDEBUG=pdb in that case :-(

I'll resend an update

A+