Modifies cmake file to workaround a problem in QtMobility package.

QtMobility installation is missing the file
/usr/share/qt4/mkspecs/features/mobilityconfig.prf on Fremantle.
Modifications were made to the cmake build files to fix the problem.
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   cmake/Modules/FindQtMobility.cmake
#	new file:   cmake/Modules/mobilityconfig.prf
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	build-2.5-dbg/
#	build-2.5/
#	debian/
#	tests/util/helper/__init__.pyo
