Bump signal-composer revision

Bump signal-composer revision

* Don't segfault at exit pointed to freed objects
* Don't use afb-genskel until C++ is handled
* Remove 3rdparty lua
* Align submodule branch to project eel branch
* Update controller submodule
* Be sure to set execution right on binaries
* Specify needed permissions for addObjects in doc
* Get builtin plugin as a normal plugin
* Update gitignore, minor fix

Bug-AGL: SPEC-1215

Change-Id: I6a924de349ccf455915b06f7a432c6c796563d9e
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>