[Nut-upsdev] configure script doesn't use result of glib test

[Charles Lepple]

I just set up another Ubuntu 8.04 slave, and I must not have installed  
all of the prerequisites, like the GLib headers:

checking if GLib is version 2.14.0 or newer... no
[...]
enable HAL support: yes
[...]
In file included from ../../drivers/main-hal.c:29:
../../drivers/dstate-hal.h:29:18: error: glib.h: No such file or  
directory
../../drivers/dstate-hal.h:30:28: error: dbus/dbus-glib.h: No such  
file or directory
../../drivers/dstate-hal.h:31:37: error: dbus/dbus-glib-lowlevel.h: No  
such file or directory

Full log: http://buildbot.ghz.cc/public/nut/builders/Ubuntu-hardy-x86/builds/125/steps/compile/logs/stdio

I can look into this later, but if I recall, we are eventually moving  
away from HAL towards some other desktop power management software.

Is it worth fixing this corner case?

- C