To use the Symbian App Booster, a registration file (matching the
filename of the executable, eg helloworld.applite) must be copied to the
import folder within QtAppBooster's private directory. The appropriate
library (qdeclarativebooster) must also be linked against. With this
change, the required actions are carried out by adding
"CONFIG += symbian_appbooster" to the application's .pro file.
Task-number: QT-4892
Reviewed-by: Miikka Heikkinen
(cherry picked from commit ae128aef03d246c9f89bed015092b1c5a925bcbc)
