[GIT PULL] trace-cmd fixes

[Josef Bacik <jbacik@fb.com>]

Hello,

I have a few outstanding trace-cmd patches that I've sent over the last 
couple of months, the bulk of which were while you were on vacation.  So 
here's a pull-able branch with the current backlog.  The 
"read_next_event" patch is authored today because I nuked the original 
git tree I had with it, but I sent it in July I think.  If these are 
acceptable you can just pull from

https://github.com/josefbacik/trace-cmd.git for-steve

Here is the shortlog

Josef Bacik (4):
       trace-cmd: make sure we have a pending pid in trace-hist
       trace-cmd: add trace-record.o to the python shared lib
       trace-cmd: add read_next_event to python lib
       trace-cmd: add helper to read kernel_stack functions

I've been carrying all but the kernel_stack thing internally for months 
and have scripts using them in production so they are well tested.  Thanks,

Josef