QNX: Added warning when low memory event is received

Low memory warning has been added for debug purposes.

Change-Id: I3ca4f1e68cec0914ce8d77b5bed4cde210c031fa
Reviewed-by: Kevin Krammer <kevin.krammer@kdab.com>
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Remove unused variable

Change-Id: I2c38192d0f913e91da44f487e5313c526ebb2fbc
Reviewed-by: David Faure <david.faure@kdab.com>
Bump Qt version to 5.2.0

Change-Id: Id2a4b8fb00837154a7fc1bf96060c0cdc808f13d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>