Bump agl-service-signal-composer

Bump agl-service-signal-composer

* 74c0e1f - Use specific binder's event handlers
* e1ef945 - Binding migration to v3
* 71507d3 - Change .gitmodules following submodule migration
* a3e28fb - Handle new metadata signal's field
* 626bf1b - Update basic configurations files
* 5f6ce66 - Migrate app-templates to CMake module
* 44c1842 - Use feature 'required-binding'
* 91dcc3a - Fix: lua detection for debian like distro
* fe8f535 - Add tests on sources injection at runtime
* 54aaf89 - Reorder and format tests
* 6636326 - Fix wrong JSON unpack type
* c6fd6ab - Use the unified script to launch tests
* 644318f - More accurate (un)subscribe answer
* 7138e18 - Handle errors on signal initialization
* e0655ca - Fix: finding JSON file even if absolute path given
* 56237d3 - Update controller submodule
* 07f57e2 - txc-binding: migration to AFB_BINDING_VERSION 3
* 2e4bbe0 - doc: Changed doc to new format
* 77973a7 - txc-binding: in conf files, rename api to txc
* 217bb01 - afb-test.sh: launch 2 binders for test
* 8264bd8 - Missing API_NAME for the test widget
* fbdf29b - Fix: segfault at object addition

Change-Id: I7ee7dcb9fec49504c6fbd4b91d4d5e32ac0d8d5d
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>