Add dump_systemstate-service

Add dump_systemstate-service

The service registers with the name org.tizen.systemstate and provides
the output of defined commands via dumpsys interface. The registration
of commands is done by adding dumpsyscmd parameter to the extra program
configuration file. For example, the following configuration in
/etc/dump_systemstate.conf.d/programs/crash-worker-programs.conf:

  ...

  [buxton system]
  order=141
  cmdflag=b
  title=System configuration
  path=/usr/bin/buxton2ctl
  args=dump system
  dumpsyscmd=buxton_system
  allowdumpsysargs=yes
  ...

allows to get the output of the command:

  /usr/bin/buxton2ctl dump system

by calling:

  dumpsys org.tizen.systemstate buxton_system

The allowdumpsysargs parameter is responsible for the possibility to
provide custom parameters via dumpsys (disallowed by default).

Change-Id: Iff9569d4975ab97addfcf32ea6c22d7237275b35