This allows to excersize different kconfig configurations in
single app. Thanks to this other samples don't have to get
extra extra options enabled just to improve test build coverage.
Change-Id: Ie5d261f3d38c60e227cf963d938b6fac6d0fb3b9
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>