[cleanup] Add more API filters

Without these, Oxygen.1a complains (wrongly from what I can tell)
about leakage of non-API types. Compiling the same project with Neon.3
does not show the errors.

Change-Id: Ic0163c70a776a7254f5677fe3c3072438ec1d6af
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
1 file changed