Add database versioning and upgrading.

Add database versioning and upgrading.

[Issue#]       SSDWSSP-615
[Bug/Feature]  Database upgrade was not possible without data loss.
[Cause]        N/A

[Solution]     Enable database upgrading by sequential calling upgrade
               sql scripts.
               Also, move all sql files to /usr/share/privilege-control/.

[Verification] -Remove one of the update files *-to-v2.sql in /db/updates,
               build and check if %check script properly detects lack of
               that file (build should stop with error).
               -Add that file again.
               -Build newest libprivilege-control (this)
                        and libprivilege-control-0.0.58
                        and libprivilege-control-0.0.59.
               -Install libprivilege-control-0.0.58, and then install newest.
               -Should install without problems. Run tests.
               -Remove database, install V59, and then install newest.
               -Should install without problems, Run tests.
               -Remove database, install newest.
               -Should install without problems, Run tests.

Change-Id: I5b232cba86c252d3ba2ac2e5432dcad816790823