shiboken: recommend opt paths in build helpers

Shiboken asks other packages to use Cellar paths to Python's include
path. Make sure it uses the opt path instead.

Closes #34893, resolves #34783.
shiboken: update 1.2.2 bottle.
python 2.7.9

Closes #34869.

Signed-off-by: Tim D. Smith <git@tim-smith.us>
python: update 2.7.9 bottle.
RabbitMQ 3.4.2
rabbitmq: update 3.4.2 bottle.