Fix for failing test (smack05_self_label) in libsmack test suite

Fix for failing test (smack05_self_label) in libsmack test suite

[Issue#]        SSDWSSP-601
[Bug]           smack05_self_label in libsmack test suite failed.
                Additionally, this fix provides the same smack
                labels "_" no matter what type of connection is
                used to communicate with the target (ssh or sdb).
[Cause]         Smack execute label on /usr/bin/libsmack-test is not
                always the same. It depends on the connection type
                during istallation.
                ssh names it "_" and sdb names it "sdbd".
[Solution]      Create "packaging/security-test.manifest" file.
[Verification]  Build, install, run test.

Change-Id: Id1cab6bb7d069e4eb8aa068d792e8344613c6986