db8: Hide QA warnings about RPATH

:Release Notes:
GF-52239 needs to be fixed, but until it is, hide the known warnings so
that we can notice when something causes new warnings

:Detailed Notes:

:Testing Performed:
Only build tested, QA warnings from db8-tests are no longer shown and
stored in qa.log

:QA Notes:
No change to image

:Issues Addressed:
[GF-52239] bad RPATH in db8-tests

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>

Change-Id: Id34212372b59c0e038c28ef0316291118420d9a8
Reviewed-on: https://g2g.palm.com/3988
Reviewed-by: DCO Verification
Build: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Maksym Sditanov <maxim.sditanov@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>