Bug#444985: live-helper: lh_build installs kernel amd64 kernel even with option -a i386

[yves at ycombe.net (yves at ycombe.net)]

> Yves Combe wrote:
>> $ grep -r LH_ARCH config/
>> config/bootstrap:# $LH_ARCHITECTURE: select chroot architecture
>> config/bootstrap:LH_ARCHITECTURE="i386"
>
> what is the value for LH_LINUX_FLAVOURS?
>
config/chroot:# $LH_LINUX_FLAVOURS: set kernel flavour to use
config/chroot:LH_LINUX_FLAVOURS="amd64"

lh_config should default this variable in concordance with -a option.