trace-cmd: Uniform main command implementation

Most of the commands have the implementation in a dedicated file.
Those commands without a dedicated file are implemented in the
`main()` function. This patch uniform the code by moving the commands
implemented in the `main()` function to dedicated files.

Link: http://lkml.kernel.org/r/20170426203028.13900-2-federico.vaga@vaga.pv.it

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
6 files changed