Add new profile icon from Tango

Started with Tango's x-office-spreadsheet, removed the database icon,
and added in the selection effect from the original Profile icon. This
remains faithful to the intent of the original icon while using
known-good assets from the Tango project as the base (and providing a
SVG as well for the future).

Resolves: OpenSCAP#275

Signed-off-by: Alexander Scheel <[email protected]>

Author: cipherboy