Add bin/qdoc to .gitignore

Changing .gitignore to match qdoc* instead of qdoc3*.

Change-Id: I94e41e6e4371c40e0dbc33639ca02523986149b0
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>