Add directories generated by build to '.gitignore'
Add directories generated by build to '.gitignore'

Signed-off-by: Antti Mattila <422fa99ecc9af171a83eb3d69d51885324be22a3@reaktor.fi>
Signed-off-by: Karim Osman <94396faf6cc817be76165477038b3cfa832e89a4@reaktor.fi>

akisaarinen/ccf,akisaarinen/ccf