Changes: Removing linker options from meegotouch_common.prf which prevents compiling MTF apps if old QT is used in the system.
Changes: Removing linker options from meegotouch_common.prf which prevents compiling MTF apps if old QT is used in the system.

RevBy: Stanislav Ionascu, Tomas Junnonen

Details: Those lines force linker to search for libraries in /usr/lib (if MTF installed there) which means that if your
system QT is 4.6 (officially supported by ubuntu) and you are compiling your application with your own version of QT,
linker will use system QT even though you used qmake from other version.

nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch,nemomobile-graveyard/libmeegotouch