af-binder: Upgrade

af-binder: Upgrade

This upgrade include bug fixes and the ability
to set variables for bindings.

The included changes, from newest to oldest, are:

  * 3aa0f4d Fix warnings and false errors
  * de0527f afb-export: Manage path of libraries
  * 5ef271e Add ability to provide binding settings
  * e39610f Improve parsing of json string
  * 10aa15a afb-socket: Separate socket creation
  * df67c02 tic-tac-toe: improve event handling
  * b4455a7 afb-msg-json: remove obsolete function
  * f70e19a afs-supervisor: Improve comments
  * 4772c56 coverage: Improve coverage test
  * 4bbad5b afb-export: Set API context as validated
  * 61b54dd main-afb-client-demo: Exit with a significant code
  * 635772b Tune dependency to fdev-epoll
  * 9cbff28 afb-api-v3: Simplify the code
  * 8d4e6df fdev: Simplify the code
  * 1bc9713 coverage: Add inet's API test case
  * 9c2e6e4 Fix some more memory leaks
  * f96bbb4 afb-config: Rewrite the config as JSON object
  * fe9601c Fix tiny documentation bug
  * 8d95d38 main-afb-daemon: Reorder instantiation of API
  * 77ca8b4 json-c: Remove escaping of slashs
  * e17ae41 coverage and test: Add tests
  * 4c0f6ce afb-api: Define the function afb_api_is_public
  * f44a28a Tiny documentation fixes
  * a4fd4bd afb-export: Fix event handler of API

Change-Id: I8f29701be8f9add9506fc6038bac968bfb63d2b8
Signed-off-by: José Bollo <jose.bollo@iot.bzh>