Add Romanian language keyboard layout

Romanian laguage has 5 additional letters to the latin alphabet (ăîâșț).
Beside these letters, minus symbol (-) is quite used, therefore it's on
the main letters page.

[ChangeLog] Added Romanian keyboard layout.

Change-Id: Iba06a0715462834493d223ecfaf6a6875b249085
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>