af-binder: Add recent improvements and fixes

af-binder: Add recent improvements and fixes

Includes the following changes:
 * 51b8ff0 Prevent false positive during check source
 * 6b70202 coverage: Allow removal of valgrind
 * bf7fe72 jobs: Clean unneeded code
 * 418ba12 watchdog: Isolate the watchdog from jobs
 * d7e4fab Rename afb-systemd to systemd
 * c330ecf system & jobs: Reverse link and acquiring events
 * d9de3cd evmgr: Isolate the event loop from jobs
 * 5715fd5 afb-args: Use secure_getenv
 * 5011060 sig-monitor: Add compiling switches
 * a2cf84e hooks: Allow to remove hooking (and/or trace)
 * 84f4aec Rename afb-config to afb-args
 * 8214e88 evmgr: Fix a "maybe uninitialized" issue
 * 50deefa Workaround an exit issue
 * 901a38c jobs: Refactor exiting jobs
 * 2ba7c20 Improve setting of options
 * ec0564b Add conditionnal support of bindings version 2
 * 16f014e Add conditionnal support of dynamic bindings
 * 60cd117 Fix false ***buffer overflow*** detection
 * ce53d8e afb-export: Fix heap corruption

Bug-AGL: SPEC-2292

Change-Id: If4540a3dc58df208ecb3ee7de363d29317bfb903
Signed-off-by: José Bollo <jose.bollo@iot.bzh>