conf: Add governor (post) configurations

conf: Add governor (post) configurations

Add memory (LMK) and cpu (boosting stall) governor configurations to
turn on/off options.

Two new section is added like below:
  - MemoryLMKGovernor in limiter.conf
    : LMK post governor related section
  - CpuBoostingStallGovernor in optimizer.conf
    : Cpu boosting stall governor related section

MemoryLMKGovernor includes configurations
  - ForegroundAppListPostGovernor: LMK post governor for foreground app list
  - WorkingSetSizePostGovernor: LMK post governor for working set size

CpuBoostingStallGovernor includes a configuration
  - CpuBoostingStallGovernor: Cpu boosting governor for stall handler

Change-Id: I901915bc6d80b66256466a54d56e9216d80f5737
Signed-off-by: Unsung Lee <unsung.lee@samsung.com>