sepolicy: using SYSTEM_EXT_<PUBLIC/PRIVATE>_SEPOLICY_DIRS variable

BOARD_PLAT_<PUBLIC/PRIVATE>SEPOLICY_DIR is going to be deprecated
so using new flag.

Change-Id: I039e81ca3bced08038f0e7f2ea3e706947d024fb
1 file changed
tree: 3f2efc8c593aba528380b15d351da90ca44df8dc
  1. generic/
  2. legacy/
  3. qva/
  4. SEPolicy.mk