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

[Eric Pouech]

> This version does not set CROSSDEBUG when -gcodeview is present in 
> CROSSCFLAGS (while CROSSDEBUG needs to be set for makedep). What do 
> you think about simplified (barely tested) version of the patch that I 
> attached?
>
it does the job!


thanks