Bug#964853: hw-probe: add support for running hw-probe once for the Debian installer

[Andrey Ponomarenko]

You'd better to use 'hw-probe -all -upload -minimal' to avoid uploading of 
unnecessary logs (including boot.log). The -probe option is currently broken as 
no one used it before (I'll try to fix it in 1.6 but it should be equivalent to 
the -minimal option).