Fix checking privilege level for hybrid apps

Fix checking privilege level for hybrid apps

There are two facts:
 - we need to store all privileges into pkgmgr database,
 - we need to check privilege level for native and web
   privileges separatelly in case of hybrid application.

Therefore, merging of native and web privilege is delayed till
checking privilege level. Installing of hybrid app will involve
customized step for checking privilege level.

Requires:
 - https://review.tizen.org/gerrit/89685

Change-Id: I7bb044e4ddb6de488e959b8433105bc22c82f0c1