plugin-api: resourced: Add cpu boosting module

plugin-api: resourced: Add cpu boosting module

Add cpu boosting governor function to be called when CPU PSI is triggered
in resourced. The goal of cpu boosting governor is finding out cpu contention reason
and making actions to do in cpu boosting controller.

A new function called cpu boosting governor is added:
  - int syscommon_plugin_resourced_cpu_boosting_governor_govern_request
	(GHashTable *cpu_boosting_info_table,
	 cpu_boosting_level_e cpu_boosting_level,
	 GSList **cpu_boosting_controller_action);
    * This function receives cpu_boosting_info_table and cpu_boosting_level
      as inputs and gives cpu_boosting_controller_action as an output.
      If return value of this function is not 0,
      then cpu_boosting_controller_action is meaningless.

Change-Id: Id6f7854278560fd8816a2e15021cccd7261b7027
Signed-off-by: Unsung Lee <unsung.lee@samsung.com>