Squashed 'qtsystems/' changes from 47258c5..26ed194

26ed194 Fix simulator compilation
c665c13 Bump qtsystems version to 5.3.0
5084080 Port bluetooth powered signal from qtmobility
dbd8acf fix file permissions on images
1d193dc Add operating system name and board name functions

git-subtree-dir: qtsystems
git-subtree-split: 26ed19484e85fb814d2735fa4a98f1ad4c51199b
Merge commit 'f4499b367d1eca341246bb1ae8d9b3b1a5948c2b'