systrace: add one to idle states

Idle state 0 cannot be distinguished from not in idle, add one to
the idle state.  Unfortunately that means the c-states don't line
up with the kernel's numbering (state0, state1, state2), but
that can't be avoided as long as trace-viewer uses a counter to
display the idle state.

Change-Id: I234e8bb5450aead5c3063cc7c2f1e01ec7ffdf31
2 files changed