trace-cmd: Fix trace-cmd split commit page sizes
trace-cmd: Fix trace-cmd split commit page sizes

The commit value in the begining of the page does not include
the header. Subtract 16 from 64bit files, and 12 from 32bit.

Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd