New review comment by biopsin on void-packages repository

https://github.com/void-linux/void-packages/pull/32824#discussion_r703533085

Comment:
@q66 mind eyeball this block once more before push..
This eliminates the "--Forcing i386 to cross compile 32bit" build i686 on x86_64 host, 
however I have'nt tested other way around.
```
archs="i686* x86_64*"
if [ -z "$CROSS_BUILD" ] && [ "$XBPS_WORDSIZE" = 32 ]; then
	configure_args+=" -DCROSS_COMPILE32=1"
else
	configure_args+=" -DCROSS_COMPILE32=0"
fi
```