af-binder: bump revision

af-binder: bump revision

Included changes:
* 8b58a16 jobs: Ensure releasing event loop
* 4bb7ed6 Set default version to 7.0.0: GRUMPY GUPPY
* 3facd51 Add gitreview file for guppy branch
* 77bf8a3 Merge changes from topic 'spec-2089'
* 194031d hello3: Fix warning unused variable
* 0c68d46 afb-hsrv: Avoid call to getnameinfo
* 2ff91c0 jobs: Remove conditionnal REMOVE_SYSTEMD_EVENT
* 48df1b4 jobs: Separate internal threads from others
* e9c6530 jobs: Refactor event loop handling
* bb5dd7a afb-proto-ws: Serialize incoming message
* a4bb03e packaging: update dependency on libmicrohttpd version
* a785953 Merge "afb-api-v3: Fix potential buffer overflow"

Bug-AGL: SPEC-2089, SPEC-2133

Change-Id: I9aa7fc1e33b57e4de629f6d1c4e241aed68b2888
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>