Updates to SB2 target kickstart file

Install all development headers and qt5 developer tools to kickstart
as per lbt's instructions about using Sailfish SDK as development
environment. This SB2 kickstart file provides everything the SDK
needs to make a proper target.
Merge pull request #1 from locusf/master

Updates to SB2 target kickstart file (Allows QtCreator deployment for Nemo!)