libgtk3: bump version to 3.14.5

- Bump version to 3.14.5
- Add a hash file
- Add a new patch to fix a regression

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>