Enable step tracing
trace_level - what kind of trace to modify
enable - 0: turn off, 1: turn on
Returns: success
success enable_tracing(long trace_level, long enable);
#define TRACE_STEP 0x0 // lowest level trace. trace buffers are not maintained
#define TRACE_INSN 0x1 // instruction level trace
#define TRACE_FUNC 0x2 // function level trace (calls & rets)
#define TRACE_BBLK 0x4 // basic block level trace