Set python_abis for postgresql

options.conf.d/python-abis.conf

@@ -19,6 +19,7 @@ games-board/pysolfc python_abis: -* 2.7
 dev-libs/gexiv2 python_abis: -* 3.6
 app-doc/gtk-doc-autotools python_abis: -* 3.6
 sys-sound/alsa-lib python_abis: -* 3.6
+dev-db/postgresql python_abis: -* 3.6
 
 # inox
 app-speech/speechd python_abis: -* 3.6