Update WindowBuilder contribution for 4.7

WindowBuilder still contributes the Mars (!) version to Oxygen as the
update to Neon was only done on the maintenance branch.
This change contributes the integration build for 4.7 (version 1.9.1)

Bug 510551
Change-Id: I014fe4a6b7e2728576cfbe198345d28b4c15c8a8
Signed-off-by: Abel Hegedus <abel.hegedus@incquerylabs.com>
1 file changed