D17406: add attributes `shared` and `__gshared`

[Shubham]

shubham added a reviewer: cullmann.

REPOSITORY
  R216 Syntax Highlighting

REVISION DETAIL
  https://phabricator.kde.org/D17406

To: aG0aep6G, cullmann
Cc: kwrite-devel, kde-frameworks-devel, hase, michaelh, ngraham, bruns, 
demsking, cullmann, sars, dhaumann