nova: support to get consumed time of a thread
nova: determine number of CPUs
nova: add native_capability comparator
initial cpu_monitor

* wrap CPU interface
* add cpu_monitor interface
* add test client using cpu_monitor interface
* support for FOC and NOVA
foc: add support to get cpu idle times of kernel
nova: add support to get cpu idle times of kernel
cpu_monitor: provide cpu idle times

works for foc and nova
nova: fix bootstrap bug

commandline_to_basename may adjust the pointer of the string, recalculate the
length accordingly.
net: add cpu idle utilization support for measurements
netperf: cpu utilization support

On base-foc and base-nova the cpu utilization is calculated based on the
idle cpu time. The rest utilization is reported as utilization for netperf.

Works solely for uni-processor setups.