host_os has a space in it

[autoconf_bug]

Hi. My host_os & build_os is "linux gnu" instead of what I expect is the
usual "linux-gnu". Seems like a bug to me but hey im just an end user. It
took me forever just to figure out which program defines host_os.

The space causes the libtool make process to execute "gnu" as a shell
command, presumably pooches others as well.

I updated to autoconf from 2.59 to 2.59c. I just tried the current 2.59d
cvs.

config.log:ac_cv_build=i686-pc-linux-gnu
config.log:ac_cv_host=i686-pc-linux-gnu
config.log:lt_cv_path_LD=/usr/i586-pc-linux-gnu/bin/ld
config.log:lt_cv_path_LDCXX=/usr/i586-pc-linux-gnu/bin/ld
config.log:LD='/usr/i586-pc-linux-gnu/bin/ld'
config.log:build='i686-pc-linux-gnu'
config.log:build_os='linux gnu'
config.log:host='i686-pc-linux-gnu'
config.log:host_os='linux gnu'

Regards,
Sean