[Bug target/32622] BOOT_CFLAGS is not passed to stage2 and stage3 compile

[Paolo Bonzini]

Sebastian Pop wrote:
> Hi,
> 
> here is a fix for PR32622 that I've bootstrapped and tested on
> i686-linux with "configure BOOT_CFLAGS=-O2" that made the bootstrap
> stage2 and stage3 use "-O2 -fomit-frame-pointer" instead of "-O2 -g
> -fomit-frame-pointer".  Okay for trunk?

Ok.

Paolo