clean up boost::atomic dependency

* Remove external/boost
* Add missing dep to boost::atomic

Change-Id: I9ec1f763d28b1f992c740d1d94f110ec28035352
Reviewed-on: http://gerrit.aldebaran.lan/43987
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Reviewed-by: pdaouadi <pdaouadi@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
perfs test: fix failing configure

Change-Id: I02b4eb42eadae28835bc6e9bb39cf0aecec43581
Reviewed-on: http://gerrit.aldebaran.lan/43953
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Export AnyObject only on MSVC (fixes android build)

Change-Id: Ie7169ceebe5315270acf6f3e0acb9c108814ef5d
Reviewed-on: http://gerrit.aldebaran.lan/44007
Reviewed-by: vbarbaresi <vbarbaresi@aldebaran-robotics.com>
Reviewed-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>
Tested-by: dmerejkowsky <dmerejkowsky@aldebaran-robotics.com>